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Washington Block
Washington Block is a concise public starting point for commercial development and architectural branding, anchored by Chicago's landmark designation.
Workspace
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Quick Take
- Official status: Chicago individual landmark.
- Address: 40 N Wells St.
- Built: 1873-74.
- Architect: Frederick & Edward Baumann.
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Why It Matters
Washington Block keeps a real place attached to commercial development, architectural branding, and corridor and downtown change.
From there, the building can be read through design, use, later change, and neighborhood context instead of remaining a detached image or isolated fact.
Field Network
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Research Narrative
Landmark Context
Washington Block is anchored to 40 N Wells St before any deeper archive work begins. The current city data lists it as dating to a construction date of 1873-74 and credits Frederick & Edward Baumann. It was designated on January 14, 1997. Washington Block already ties commercial development, architectural branding, and corridor and downtown change to one real building before archival digging begins.
Washington Block gains definition in the field when attention concentrates on storefront depth, upper-floor expression, and corner treatment, how the facade addresses pedestrian traffic, and later signage, infill, or reuse. That kind of fieldwork helps clarify how commercial architecture stayed visible even as the economic life around it changed.
Research Starting Points
Washington Block starts to deepen once research reaches trade press and city directories, permit files and assessor records, and historic photographs and newspaper coverage. Those materials are usually what turn site observation into a more convincing historical record.
Washington Block remains most useful when later evidence keeps returning to the site itself.
Public Actions
Campaign / Petition Record
Ordered oldest to newest.
1873-74
Development
Construction period recorded in city landmark data
by Public record Previous
Chicago's public landmark data records Washington Block as built in 1873-74.
January 14, 1997
Designation
Chicago individual landmark designation
by Public record Previous
City of Chicago designated Washington Block as an individual landmark on January 14, 1997.
February 2026
Inventory
City landmark address list and data portal record
by Public record Current
Washington Block remains listed in Chicago's public individual-landmark address list and open-data record.
Signals
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Sources
Source Trail
City of Chicago Open Data: Individual Landmarks
dataset
Use for address, built date, architect, and point geometry in the city data portal.
Chicago Landmark Address List February 2026
institution
Use for address normalization and cross-checking the city's public landmark list.
Place Snapshot
- Place
- Washington Block
- Location
- 40 N Wells St, Chicago, Illinois
- Coverage
- Exact
Key Facts
- Region
- Chicago, Illinois / Midwest
- Place type
- Commercial Building
- Current status
- Preserved
- Address
- 40 N Wells St
- Built
- 1873-74
- Architect
- Frederick & Edward Baumann
- Designated
- January 14, 1997
Design / Planning Timeline
Frederick & Edward Baumann
1873-74
Milestone
Design architect or firm credited in current city landmark data
Use as a starting point for confirming authorship against permits, drawings, and later landmark reports.
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