• This website includes dozens of videos, hundreds of essays, and thousands of drawings created over the past twenty years. Search to learn more about the history of buildings, places, prisons, Newark, New York City, and my PhD research on spatial inequality.

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A park without trees creates a city without history.

Harriet Tubman Square has the largest and most impressive collection of old-growth trees in Downtown Newark. The oldest trees are over 100 feet high, four-feet diameter at the trunk, and up to 150 years old. The City of Newark’s current proposal is to cut every single tree in our park. The only historical precedent for this is the 1960s project that killed every tree in Military Park to build the parking garage now buried beneath. Based on details and architectural plans revealed through an Open Public Records Act request, this animation shows what is planned for our park:

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Read the plans for the park.

Read our analysis of these plans.

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We cheer for the historic Harriet Tubman Park for a new, prosperous, and most of all just Newark.
However, nobody should even imagine cutting down these 66 century-old trees, oaks, elms, sycamores, all of which represent our history and particularly African-American experience. In America, trees symbolize both freedom and brutal oppression, should any sensible person forget. Unlike any historic treasures – architectural remnants, shriveled old maps, aged documents, or battled artifacts – these trees are among our most valuable historic icons, standing tall for our children.
Tubman embodied the notion of reclaiming the symbolism of trees and woods as tools of freedom in the black tradition. In the antebellum America, abolitionists always voiced lyrics about glorious trees that bore the fruit of freedom. Dr. Martin Luther King famously said, “Even if I knew tomorrow the world would go to pieces, I would still plan my apple tree.” Tubman was famous for knowing the terrain of trees, woods, and swamps along her journey to freedom. In Tubman’s biography by Sarah Bradford, the black Moses said, “When I found I had crossed that line, I looked at my hands to see if I was the same person. There was such a glory over everything; the sun came like gold though the trees, and over the fields, and I felt like I was in Heaven.”
On the other hand, Billie Holiday sang about fruits produced by these trees: “Southern trees bear strange fruit/Blood on the leaves and blood at the root/Black bodies swing in the southern breeze/Strange fruit hanging from the poplar trees/ …Here is a strange and bitter crop.” The blood of black men, women, and children who refused to remain silent, and who deserve justice, life, liberty, and love, over the hate that surround them.
Last year, Rutgers Newark restored the history and voices of Frederick Douglass in the Historic James Street Commons. Let us not forget, Douglas also said, “If Americans wished to partake of the tree of knowledge, they would find its fruit bitter as well as sweet.” It is unimaginable that Tubman will allow these venerable trees of knowledge to be annihilated.

Cathedral of Beauvais: Sublime Visions; Thwarted Ambitions; A Sketch

Of all the stories of the greatest Gothic cathedrals, the tale of Beauvais is the most exciting. Construction of the Gothic cathedral began in 1225 at a time of bitter turmoil when France was establishing itself as a nation within its familiar modern geographical bounds. Beauvais, the tallest cathedral in France, was never completed, having endured two major collapses and a series of structural crises that continues to this day. Our Sketchup animation follows this dramatic narrative, allowing the viewer to experience and understand the famous collapse that brought down the upper choir in 1284 as well as the underlying design features that led to that disaster. Particularly intriguing is the visualization of the short-lived crossing tower constructed in the mid-sixteenth century and the rivalry between S-Pierre of Beauvais and Saint Peter’s in Rome.
It is hoped that besides appealing to a general audience of cathedral fans, this movie will be useful in the context of the classroom at high-school and university levels.

Directed by Stephen Murray

Produced by Myles Zhang

Special thanks to Étienne Hamon

Explore more

Further reading: Stephen Murray. Beauvais Cathedral: Architecture of Transcendence. Princeton University Press, 1989.
Visit Mapping Gothic for further photos and a panoramic tour of the cathedral interior.
Visit this link to download image stills of the cathedral at various stages of completion, for reuse in print publications.

Source files

Creating this animation required creating a computer model of the entire cathedral at all stages of construction. This model is shared below; click and drag your cursor to move around this virtual space.

Email [email protected] and [email protected] for access to source files.

High-resolution image stills from construction sequence

1220s fire to 1284 collapse
Before vs. after 1284 collapse
After 1284 collapse vs. after 1300s rebuilding
1284 collapse to 1550s transept
Proposals for completing cathedral
Proposed cathedral vs. actual extent of construction by 1573 collapse
Contemporary

Image sources

Hand-drawn image textures used in this model are based on actual scanned drawings of the cathedral: floorplan, choir section, choir elevation, and hemicyle section.

Audio sources

High medieval music: Viderunt Omnes by Pérotin, 1198
Late medieval music: Ave Maria by Josquin des Prez, c.1475
Contemporary cathedral: Pierre de Soleil by Philip Glass, 1986
Sound of material buckling
Sound of structural collapse

Optimizing Architectural Models for Display Online

Difficulty Level: Intermediate to Advanced

This workshop for designers is paired with an interactive history animation about the construction of Notre-Dame of Paris. You will learn how to create highly detailed but low-polygon-count models of any building you desire. These visually and geometrically complex models will have a small enough file size to load in your web browser. They can be viewed by clients, possible employers, and others online, with no need for them to download files or own specific software. Based on the content delivered in this six-part tutorial, you will be able to create similar models of any other building, real or proposed. You will be able to share these models online in a virtual reality format through Sketchfab.
1.  Introduction
2.  How much detail does a model need?
3.  How can strategic use of components save on time and polygon count?
4.  How can any image be transformed into a seamless texture?
5.  How can custom image textures reduce polygon count?
6.  How can models be uploaded and optimized for online views?

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The Model:

Please allow a minute or so to load. Model is 500,000 polygons.

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1. Introduction

8.5 minutes. Optimizing computer models of architecture for interaction online.

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2. How much detail does a model need?

3.0 minutes. Determining the right level of detail a model needs.

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3. How can strategic use of components save on time and polygon count?

6.0 minutes. Creating complex geometric forms from simple component building blocks.

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4. How can any image be transformed into a seamless texture?

7.5 minutes. Creating your own seamless image textures in Photoshop.

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5. How can custom image textures reduce polygon count?

7.5 minutes. Editing custom image textures to create visual complexity from geometric simplicity.

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6. How can models be uploaded and optimized for online views?

4.5 minutes. Finishing touches.

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Detroit Redlining Map in 1940

A data visualization of urban history and racializing space
Created with urban historian Robert Fishman

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This map illustrates in three layers some of the impacts of a racist government policy called redlining:
  1. The base map shows the extent of street network development, as well as the locations of important industries, institutions, and urban features in 1940.
  2. The population dot map shows the areas where Black and Whites lived in the segregated city.
  3. The redlining map shows the areas where government and banks chose not to invest, and to therefore deprive people living there of homes.
All three features – the physical city, the urban residents, and the urban policy of redlining – are interlinked. By displaying these three features together, previously invisible aspects of urban history become visible in plain site to the public.

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View project full screen

Opens in new window

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Data sources:

Topoview from USGS for street network maps
Mapping Inequality Projecct for redlining data
IPUMS at the University of Minnesota for population and race by census tract

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Created with help from:

Robert Fishman academic mentor
Karl Longstreth from the Clark Map Library at the University of Michigan
Gergely Baics and Wright Kennedy from Columbia History Department
whose project about racializing space in New York City inspired this proposal

Historical Reconstruction of Ford Model T Assembly Line

As featured on Kottke.org
This digital model and film show, for the first time, the entire Model T being assembled from start to finish in a single time-lapse shot of the Ford factory in Highland Park, Michigan. Numerous photos were taken and some films were made in the 1910s and 1920s, but no film from the time tracks the entire car’s assembly from start to finish. There were many types of Model Ts produced, but the specific car shown here is the 1915 Model T Runabout. Watch the film and see as the various car components are hoisted over and bolted into place. Or walk across the factory floor in the virtual reality computer model.

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The film’s audio replicates the sound of Model T production. The accompanying music at start and end is from the 1936 film Modern Times, where comedian Charlie Chaplin parodies Ford’s assembly line production methods.

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Explore Model T assembly in virtual reality.
Give thirty seconds for browser to load. Link opens in new window.

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Henry Ford did not invent the car, nor he did invent the assembly line to produce the car. For years before Ford, cars were being built in small numbers at local workshops. For centuries before Ford, assembly line production was being used to make all manner of goods like pins, fabrics, and steel. At the same time as Ford, others were making cars and building assembly lines.
Ford was not the first, but his car and moving assembly line were certainly the most successful and memorable. After creating his version of the automobile in 1896, Ford moved workshops first to Mack Avenue and later to Piquette Avenue in Detroit. These first two factories were small-scale structures for limited car production. Only in 1913 at Ford’s third factory at Highland Park did mass-production begin on a truly large scale. As shown in this film, here Ford applied assembly line methods throughout the factory to all aspects of car production.

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Final Stage of Model T Assembly in Highland Park c.1915, David Kimble’s illustration for National Geographic

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Between when the first Model T rolled off the assembly line in 1913 and when the fifteen millionth rolled off in 1927, the car’s appearance did not change significantly. The car chassis, motor, and color-scheme in 1927 were almost identical to 1913. Despite variations in the number of seats and exterior of car, the motor and chassis beneath were consistent and unchanging over time. Henry Ford liked it that way to bring down costs and to produce the greatest variety of car types with as few variations as possible to the car’s internal structure.
However, although Ford resisted changes to his car design, he was always redesigning the factory floor and assembly line to produce the greatest number of cars with the least amount of human labor. In this same period from 1913 to 1927, the Highland Park factory was constantly redesigned and expanded. Few records survive of all changes to the factory. However, the 1915 book Ford Methods and the Ford Shops includes detailed plans and photos of the factory at one point in time. Ford was still tinkering with the assembly line, as Model T production had begun just over a year before this book was printed. Within a few months of these photos, assembly line methods had improved once again as Ford redesigned the factory floor shown in this film. Rather than documenting Ford production for all time, this film captures Ford production the way it looked in the months it started.

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Assembly line flowchart of River Rouge c.1941, showing Ford’s production methods applied to the design of an entire complex. The ideas in embryo at Highland Park become fully visible at River Rouge.

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After Ford stopped producing Model Ts in 1927, newer models started production at the new and larger factory at River Rouge, where Ford makes cars to this day. The Highland Park factory switched to producing other goods like tractors and later tanks for WWII. Within a few years, production methods had so quickly improved under Ford that Highland Park became too small and obsolete. The factory was largely demolished, and with its demolition the initial appearance of Ford’s first and greatest invention was lost for all time: the moving assembly line.
Some of the factory buildings still stand, and the specific part of the factory shown in this film still exists. But the buildings were all cleared of their original machinery, and the most impressive part of Ford’s invention was not the factory itself but instead the equipment and processes within that factory that are no longer visible. The buildings themselves were simply functional warehouses designed with large open spaces to allow the easy movement of machinery.
The entire complex covered many acres, and the other factories that supplied the Highland Park factory with materials and components created a web of trade that spanned the globe. Instead of filming the entire process, this film focuses on the final and most important stage of production where finished parts from all over the world and factory complex came together for final testing and assembly.

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Sources

Main reference text: Fay Leone Faurote and Horace Lucian Arnold. Ford Methods and the Ford Shops. New York, Engineering Magazine Company: 1915. See esp. Chapter V on “Chassis-Assembling Lines” that includes factory floor plan and photos from pages 131-57. Also see pages 142-150 that describe the 45 steps required for chassis assembly. Link.
Main reference photo: David Kimble. “Exploring the Model T Factory.” Motor1.com. September 1, 2017. Link. Kimble’s image originally published in June 1987 National Geographic centerfold.
Animation opening image: Postcard of Highland Park in 1917. Link.
Animation opening music: Factory Scene from Modern Times, directed by Charlie Chaplin in 1936. Link.
Model T shown in film can be downloaded as a computer model at this link.

Branch Brook Park Interactive History Map

As featured by the Branch Brook Park Alliance as the official park map

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Navigate this interactive history map of Newark’s Branch Brook Park. Click on map features to learn about park amenities, recreational spaces, and historic features. Map annotations are paired with explanatory texts and comparative photos of past and present. Beneath each annotation is the Google Maps link that will display directions to that point in the park from wherever you are standing.
All historic images are from the archives of the Essex County Parks Department and Newark Public Library. Browse their digital collections or contact the agency to visit their archives. All descriptions are sourced from the Cultural Landscape Report that documented the park’s history and renovation.
Map created by Myles Zhang
Map texts by Linda Morgan, Curtis Kline, Myles Zhang, Maeher Khosla, and Jack Barron
Contemporary photos by Curtis Kline with Mouli Luo

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Read More

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The Privatization of Public Space in Lower Manhattan

Map created by author in QGIS with planimetric data from NYC Open Data

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More than a specific threat to New York City, the decades-long erosion of public space is an existential threat to democracy.

About 60% of Lower Manhattan’s surface area is listed as being public in some way, but only about 25% is totally unrestricted to the public in practice.*1

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New York City – and the world’s wealthiest corporations headquartered in Lower Manhattan – had much to do with inventing and spreading new technologies that influenced the urban form. Construction companies like US Steel at 165 Broadway supplied materials for the highways that sliced through cities. Car companies like Chrysler in Midtown encouraged America’s affair with gasoline. Groups like Chase Bank at 28 Liberty Street supplied home loans for whites-only suburbs. Stores like Woolworth at 233 Broadway helped replace small businesses on main street with one-stop department stories and suburban shopping malls. Above them all, the New York Stock Exchange at 11 Wall Street supervised the twentieth-century migration of wealth and capital from American industrial cities to foreign countries with cheaper labor. These changes might have started with the “titans of industry” perched in Lower Manhattan’s skyscrapers, but highways, cars, home mortgages, shopping malls, and de-industrialization all had consequences for the rest of us. This makes Manhattan the ground zero – and in more ways than just September 11 – to understand the forces shaping the loss of public space.
Over the past century, three forces in Lower Manhattan have been chipping away at the quantity and quality of public space: the car, the corporation, and the police state. Each of these three forces effected Lower Manhattan in particular and the nation at large. Each of these three forces, prompted by changes in technology, reshaped the urban form: 1) the invention of the affordable and mass-produced car that substituted for public transit; 2) the abandonment of cities for suburbs that was enabled by the car and encouraged by corporations; and 3) the invention of surveillance technologies to collect, store, and analyze data collected from public spaces. Each of these three technologies were, in turn, weaponized against the urban form to chip away at spaces that once belonged to society at large but which now belong to a select few. Each force will be analyzed in turn – the car, the corporation, and the police state – to reflect on the impact of each on Lower Manhattan’s urban form.

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Public spaces in theory:
~60% of Lower Manhattan’s surface area

Read More

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  1. * Percentages are rough estimates from author, based on area south of Chambers Street with planimetric data from NYC Open Data. An exact estimate is impossible to arrive at because there is no single definition of public space.

Street Grid Development vs. Population Density

Adapted from Shlomo Angel and Patrick Lamson-Hall’s NYU Stern Urbanization Project,
here and here.

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The animation at left shows street grid development from 1801 to 2011, mapping Manhattan’s gradual expansion north. The animation at right shows the population density over time of each census tract in Manhattan. Notice how Manhattan’s population density rises and peaks around 1900 before falling to present levels. Despite Manhattan’s appearance of being denser and more built up with skyscrapers than ever before, the island actually has a lower population density than a century ago.

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Before the introduction of subways in the early twentieth century, the difficulties of commuting distances over land and water drove a denser form of urbanism than today. By 1900, the island of Manhattan had over 2.3 million residents in comparison to only 1.6 million in 2020. These people were crowded into dense blocks with upward of half a million people per square mile. The subways had not yet opened, suburban sprawl had not yet arrived, there were no rail connections under the Hudson River, and Manhattan had few or no road connections with the other boroughs and the mainland. This produced an island of remarkable density with the Lower East Side the densest place on earth, while only a few miles north, Harlem remained almost rural.
In 1903, the Williamsburg Bridge over the East River linked the Lower East Side with undeveloped Brooklyn. The trolley lines, subways, and roadway that stretched over the Williamsburg accelerated the development of Brooklyn, first in the higher density parts of Brooklyn closest to Manhattan and later to the distant parts of Brooklyn and Queens with suburban population densities. Suburban growth started earlier than the 1950s image of Levittown, and with the movement of people outwards from Manhattan, the centers of immigrant cultural life shifted, too. In every following year, the Lower East Side lost people, arriving at a density in 2020 only a sixth of what it was in 1900.
Over the following decades, improvements in public transportation and the introduction of the car “smoothed” out the population density. At the same time, Manhattan’s street network expanded to cover the whole of the island from end to end. As the subways made commuting easier, people no longer need to live within walking distance of where they worked. As a result, many industries remained in Manhattan while their workers moved to other boroughs, and later still to the more distant suburbs. As a result, the population densities of Manhattan today are more consistent from one end of the island to the other. Unlike in 1900, Harlem today is about as dense of the Lower East Side because transportation has made one part of the island almost as accessible to work as any other part of the island.
This animation illustrates Manhattan specifically, but Manhattan’s growth and population densities were influenced by larger population and technology changes in the New York region.

The Detroit Evolution Animation

Created in gratitude to the University of Michigan’s PhD program in architecture
Related: The New York City Evolution Animation

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Soundtrack: “Pruitt Igoe” from Koyaanisqatsi, directed by Godfrey Reggio and composed by Philip Glass.

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This film traces Detroit’s evolution from its origins as a French trading post in the 1700s, to its explosion as a metropolis, followed by its precipitous decline as a symbol of America’s post-industrial urban landscape. The film weaves in details about the city’s politics, population, and technology – all of which influenced the city’s geography and built environment. At each phase in urban history, the built environment grew and was modified in direct response to political events like racial segregation, population changes like the Great Migration, technology developments like the mass-produced car, and government interventions like urban renewal.
The animation tells the story of Detroit specifically and the story of American cities more broadly. To varying degrees, the path of Detroit’s development mirrors hundreds of other smaller cities and towns scattered across the American Northeast and Midwest. No other American city witnessed as large a population loss, as dramatic 1960s racial unrest, or as radical a transformation from symbol of progress into symbol of decay. To a lesser degree, other places in America followed Detroit in lockstep. Urban renewal projects, highway construction, racial tensions, suburban growth, and infrastructure under-investment happened across America, and in parallel to Detroit.
However, the most dramatic transformation of Detroit is left unwritten in this film. Beneath the surface-level events of political conflict and urban change, the largest event in Detroit is not unique to Detroit. As filmmaker Godfrey Reggio describes, the most important theme in the history of civilization is “the transiting from all nature, or the natural environment as our hosts of life for human habitation, into a technological milieu into mass technology as the environment of life.” European cities developed slowly and gradually over centuries, in the process removing all memory of the natural landscape before civilization. American cities are unique in their youth and speed of growth. They are new enough that an active memory survives through place names and written records of the landscape and indigenous peoples who lived there before colonization. As the oldest colonial settlement west of the Appalachians, and as the city that perfected the mass-produced automobile, Detroit becomes the prime symbol of man’s transformation of his home from a natural world into a technological society removed from nature.

View map bibliography and project methodology

Includes links to download all source files on which the film is based

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The accompanying music is by composer Philip Glass and was written for Godfrey Reggio’s 1982 experimental documentary Koyaanisqatsi. The shifting layers and repetitive phrases of Glass’ music accompany Reggio’s montages of natural landscapes, factory assembly lines, and chaotic city streets. Koyaanisqatsi means “life out of balance” in the language of an indigenous American tribe called the Hopi. In the original documentary, Glass’ music was paired with scenes of desolate streets in the South Bronx, the abandoned Pruitt-Igoe public housing in St. Louis, and ruined skyscrapers falling in slow motion. In my reinterpretation of Glass’ music, the imagery is now of Detroit in maps. The pace and events in the animation are tied to the structure of the music. As the volume and speed of the music increase and decrease, so too does the growth and decline of Detroit.

View music in original context

Pruit Igoe from Koyaanisqatsi; composed by Philip Glass with images by Godfrey Reggio

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Population Changes to Detroit Over Time

Hover over infographic for details of each census year.

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The influx of Black people during the Great Migration and the outflow of cars from Detroit’s factories reshaped the city’s built environment and the American public’s perception of Detroit. Detroit is now thought of as a majority-Black city surrounded by majority-White suburbs. Today, 83% of Detroit’s population is Black, and only 11% is White. But the graph above shows that Detroit was majority-White until the 1980 census. For most of its history, Detroit was 95 to 99% White. Today, the majority of the metro region’s population lives in the suburbs that surround Detroit. But until the 1960 census, the majority of the population lived within the city limits. Today, Detroit is so reliant on the car that it has no commuter rail network, no subways, and limited public transportation options. But until the 1950s demolition of Detroit’s light rail network, a majority of residents lived within walking distance of a light rail station for commuting. Detroit’s demographics, suburban sprawl, and transportation options have all flipped in the past century. From a high-density, transportation rich, and majority-White city in 1920, Detroit has become a low-density, transportation poor, and majority-Black city in 2020.
A lot of people say Detroit has terrible public transit design. But from the perspective of car companies, the real estate lobby, and fearful Whites, the system does exactly what it was intended to do: to segregate and divide our country by covert means long after Jim Crow officially “ended.” Failure by design. The failure of Detroit is, in large part, planned and a consequence of government policy decisions that: prioritize suburban growth over urban development; benefit suburban Whites over urban Blacks; and encourage private cars at the expense of public transit.
As the Detroit Evolution Animation plays, the map key on the lower right hand corner indicates Detroit’s demographics at each decade in history. Try to link changes to demographics with changes to the urban form. Ask yourself the questions: How were technology, transportation, and demographic changes imprinted on the built environment? How does the built environment, in turn, shape urban and suburban life?

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Decaying home near Detroit’s abandoned Packard Automotive Plant

Notre-Dame of Paris Construction Sequence

Created with architectural historian Stephen Murray
As featured in:
1. Notre Dame’s official website
2. Open Culture, May 2021
2. Rebuilding a Legacy, hosted April 2021 by the French Embassy, view recording
3. Restoring a Gothic Masterpiece, hosted May 2021 by the Los Angeles World Affairs Council and Town Hall, view recording

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1. Construction time-lapse

This construction time-lapse illustrates the history of Notre-Dame from c.1060 to the present day, following ten centuries of construction and reconstruction. Model is based on actual measurements of the cathedral and was peer reviewed for accuracy by scholars at Columbia University’s art history department and at the Friends of Notre-Dame of Paris.
The film was created in the computer modeling software SketchUp, based on hand-drawn image textures. The ink drawings of nineteenth-century architect Viollet-le-Duc were scanned and applied to the model surfaces, so as to transform the two-dimensional artwork into the three-dimensional digital. I believe computer models should preserve a certain handmade quality.

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Music: Pérotin, Viderunt Omnes

View animation with music only.

Read text of Stephen Murray’s audio narration.

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2. Virtual reality computer model

Explore the interior and exterior of Notre-Dame in virtual reality.
Give thirty seconds for browser to load. Link opens in new window.
Complete model of Notre-Dame inside and out. Download includes simulation of cathedral construction sequence.

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Fire on 15 April 2019

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3. Research method and work flow

Learn how this model was created – and how to create similar models of your own – with my series of online tutorials shared to this page.

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4. Computer model and construction sequence sources

– Dany Sandron and Andrew Tallon. Notre-Dame Cathedral: nine centuries of history.
– Eugène Viollet-le-Duc. Drawings of Notre-Dame. From Wikimedia Commons.
J. Clemente. Spire of Notre-Dame. From SketchUp 3D Warehouse.
– Eugène Viollet-le-Duc and Ferdinand de Guilhermy. Notre-Dame de Paris. From BnF Gallica.
– Caroline Bruzelius. “The Construction of Notre-Dame in Paris” in The Art Bulletin. From JSTOR.
– Michael Davis. “Splendor and Peril: The Cathedral of Paris” in The Art Bulletin. From JSTOR.

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5. Exterior still images from model

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6. Interior still images

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7. Dynamic angles

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