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Chicago Architecture and Urban Planning

HistoryFoundationOne month10 modules30 lessons~256 min read

First Lesson

Fort Dearborn and the Canal Commission Grid of 1830

James Thompson's original plat map that established the rigid block system over the Chicago River's wild geography.

The Swamp and the Wooden Fort

Picture a wild, wet grassland where a river bends lazily into a massive lake. In the early 1800s, the place we call Chicago was a swampy marshland dominated by wild garlic. It was a difficult place to build, but it was also a highly strategic spot. To control the water route between the Great Lakes and the Mississippi River valley, the United States army built Fort Dearborn here in 1803. This log fortress stood on a small hill of dry ground on the south bank of the Chicago River, watching over a landscape of mud, water, and sand dunes.

PortageA low, wet land path where travelers have to carry their boats and supplies from one waterway to another.

The fort was not built to start a city, but to guard a vital portage. Native peoples and fur traders had used this muddy shortcut for centuries to move their canoes between the river and the lake. When the United States government decided to build a massive canal to permanently connect these waterways, they needed to fund the project. In 1830, they appointed a group of officials called the Canal Commissioners to map out and sell the surrounding land to raise the necessary money.

The Birth of the Canal Grid

To sell the muddy wilderness quickly, the commissioners hired a surveyor named James Thompson. He did not design a town that fit the curves of the river or the wet shape of the land. Instead, he laid down a rigid, paper-flat checkerboard pattern of square blocks and straight streets. This layout is known as a gridiron plan. Thompson's map covered just three-eighths of a square mile, stretching from modern-day State Street to Halsted Street, and Madison Street to Kinzie Street. It completely ignored the swampy reality of the ground beneath it.

Gridiron PlanA city layout where straight streets cross each other at right angles, creating equal-sized, rectangular blocks.
The grid was a mathematical net thrown over a wild, watery landscape, turning a swamp into a set of neat, tradeable boxes.— Harold M. Mayer, The Growth of Chicago

This grid was highly practical for land speculation, which is the act of buying land cheaply in the hope of selling it later for a quick profit. Straight lines and equal, rectangular lots made it incredibly easy for buyers in distant cities like New York to purchase land sight unseen. They did not need to visit the muddy banks of the river; they only needed to look at Thompson's neat paper grid. This simple map instantly turned wild nature into a highly liquid financial asset, setting the stage for a massive real estate boom.

  • The gridiron plan was chosen for speed and ease of sale, prioritizing financial speculation over the natural geography of the Chicago basin.
  • By treating the land as a flat sheet of paper, the Canal Commissioners created a rigid layout that forced future generations to radically reshape the physical environment to fit the grid.

Cronon, William. Nature's Metropolis: Chicago and the Great West. W. W. Norton & Company, 1991. — This landmark book explains how the transformation of Chicago's landscape was driven by the demands of eastern financial markets.

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Full curriculum

  1. Module 1 The Swamp and the Grid, 1803–1869 How the early settlement raised itself out of the mud through the Illinois and Michigan Canal and the physical lifting of the city streets.
    • Fort Dearborn and the Canal Commission Grid of 1830James Thompson's original plat map that established the rigid block system over the Chicago River's wild geography.
    • The Illinois and Michigan Canal of 1848The construction of the ninety-six-mile waterway that linked the Great Lakes to the Mississippi River system.
    • The Great Physical Elevation of Chicago StreetsGeorge Pullman and the engineering feat of using thousands of jackscrews to lift brick hotels out of the swamp.
  2. Module 2 The Great Fire and the Blank Slate of 1871 The destruction of the wooden city and the immediate legislative and architectural responses that shaped the reconstruction.
    • The O'Leary Barn and the Path of the FlameHow dry weather, wooden infrastructure, and southwest winds allowed the 1871 fire to consume three square miles of the city.
    • The Fire Limits Ordinance of 1872The political battle over banning wooden construction within the city center and the rise of brick and stone mandates.
    • The Debris of the Lakefront and the Creation of Grant ParkHow millions of tons of charred ruins were dumped into Lake Michigan to form the foundation of Chicago's premier public park.
  3. Module 3 The Chicago School and the Invention of the Skyscraper The structural innovations in steel, glass, and foundations that allowed commercial buildings to climb to unprecedented heights.
    • William Le Baron Jenney and the Home Insurance BuildingThe engineering behind the world's first metal-frame skyscraper built in 1884.
    • The Monadnock Building and the Limits of MasonryBurnham and Root's sixteen-story office tower featuring six-foot-thick load-bearing brick walls at its base.
    • Louis Sullivan and the Schlesinger & Mayer Department StoreThe integration of structural steel skeletons with organic, cast-iron ornamentation on State Street.
  4. Module 4 The White City and the City Beautiful Movement, 1893 The design of the World's Columbian Exposition and its lasting influence on American monumental civic planning.
    • Jackson Park and the Olmsted Landscape DesignFrederick Law Olmsted's transformation of sandy marshes into a system of lagoons, canals, and wooded islands.
    • The Court of Honor and the Beaux-Arts MandateDaniel Burnham's enforcement of neoclassical symmetry, uniform cornice lines, and white staff plaster for the fair's main pavilions.
    • The Midway Plaisance and the Ferris WheelThe segregation of commercial entertainment and ethnic exhibits from the formal, neoclassical fairgrounds.
  5. Module 5 The Burnham Plan and the Re-Engineering of the Metropolis The 1909 master plan that reshaped Chicago's lakefront, streets, and transit systems for the automobile age.
    • The Wacker Manual of the Plan of ChicagoThe distribution of Daniel Burnham and Edward Bennett's urban planning textbook to eighth-grade classrooms across the city.
    • The Widening of Michigan Avenue and the Double-Decked Wacker DriveThe transformation of Pine Street into a grand boulevard and the creation of a two-level roadway to separate commercial traffic.
    • The Forest Preserve District of Cook CountyThe acquisition of tens of thousands of acres of outer-ring woodlands to create a permanent green belt around the urban core.
  6. Module 6 The Prairie School and Residential Revolution Frank Lloyd Wright and his contemporaries' rejection of European revivalist styles in favor of horizontal, organic domestic architecture.
    • The Robie House and the Horizontal LineFrank Lloyd Wright's 1910 masterpiece featuring cantilevered roof eaves, continuous bands of art glass, and a central hearth.
    • The Charnley-Persky House and the Sullivan-Wright CollaborationThe transitional Gold Coast residence that showcases Louis Sullivan's massing and a young Frank Lloyd Wright's draftsmanship.
    • The Bungalow Belt and the Working-Class Brick StandardThe rapid expansion of standardized, one-and-a-half-story brick homes along the city's outer edges during the 1920s.
  7. Module 7 The Tribune Tower and the Battle of Architectural Styles The landmark 1922 international competition that pitted historicism against the emerging modernist aesthetic.
    • Howells & Hood and the Neo-Gothic VictoryThe winning design of the Chicago Tribune headquarters, complete with flying buttresses, gargoyles, and stones from historic world monuments.
    • Eliel Saarinen's Second-Place Entry and the Stepped-Back SkyscraperThe clean, vertical, unornamented tower design that influenced American skyscraper architecture for the next three decades.
    • The Chicago Zoning Ordinance of 1923The implementation of setback laws that restricted building volume and mandated tower setbacks to allow light to reach the streets.
  8. Module 8 Mies van der Rohe and the Second Chicago School The arrival of the Bauhaus diaspora and the dominance of the steel-and-glass International Style in the mid-20th century.
    • The Illinois Institute of Technology Campus and Crown HallLudwig Mies van der Rohe's master plan and his clear-span masterpiece of universal space suspended from steel plate girders.
    • 860–880 Lake Shore Drive ApartmentsThe twin twenty-six-story residential towers that defined the structural skin-and-bone aesthetic of modern high-rises.
    • The Federal Center and the Red FlamingoThe juxtaposition of Mies's black steel towers with Alexander Calder's sweeping, curvilinear steel sculpture in the open plaza.
  9. Module 9 The Mega-Structure Era: Skidmore, Owings & Merrill How structural engineer Fazlur Khan and architect Bruce Graham redefined the skyscraper through structural tube systems.
    • The John Hancock Center and the Trussed-Tube SystemThe construction of the 100-story tower utilizing exterior diagonal cross-bracing to resist wind loads.
    • The Sears Tower and the Bundled-Tube InnovationThe assembly of nine separate square tubes of varying heights to create the world's tallest building in 1974.
    • The Inland Steel Building and the External Column LayoutThe 1958 office tower that placed its structural columns outside the usable floor plates to maximize open interior office space.
  10. Module 10 Urban Renewal, Public Housing, and the Divided City The physical transformations wrought by the federal housing acts, highway construction, and the demolition of historic neighborhoods.
    • The Dan Ryan Expressway and the Physical Segregation of the South SideThe planning and routing of the fourteen-lane highway to act as a racial barrier between neighborhoods in the 1950s and 60s.
    • The Rise and Fall of the Cabrini-Green Public Housing ComplexThe transition from low-rise row houses to high-rise towers under the Chicago Housing Authority and their subsequent demolition.
    • The Preservation Movement and the Loss of the Chicago Stock ExchangeRichard Nickel's tragic fight to document and save Louis Sullivan's masterpieces, sparking the modern landmark protection ordinances.

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