Public Research

Plymouth Building

Plymouth Building is a concise public starting point for commercial development and architectural branding, anchored by Chicago's landmark designation.

Plymouth Building 417 South Dearborn Street, Chicago, Illinois Precision: Exact

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Quick Take

  • Official status: Chicago individual landmark.
  • Address: 417 South Dearborn Street.
  • Built: 1899-1945.
  • Architect: Simeon B.Eisendrath; W. Scott Armstrong.

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Why It Matters

Plymouth Building gives commercial development, architectural branding, and corridor and downtown change a durable public anchor.

That public anchor is what allows later work on ownership, alteration, neighborhood setting, and interpretation to build outward in a disciplined way.

Field Network

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Research Narrative

Landmark Context

Plymouth Building comes into public view at 417 South Dearborn Street in the Chicago landmark record. The current city data lists it as dating to a construction date of 1899-1945 and credits Simeon B.Eisendrath; W. Scott Armstrong. It was designated on December 14, 2016. Plymouth Building already ties commercial development, architectural branding, and corridor and downtown change to one real building before archival digging begins.

Plymouth Building starts to make more sense when researchers track storefront depth, upper-floor expression, and corner treatment, how the facade addresses pedestrian traffic, and later signage, infill, or reuse. Those observations help show how commercial architecture stayed visible even as the economic life around it changed.

Research Starting Points

Plymouth Building can be carried further through trade press and city directories, permit files and assessor records, and historic photographs and newspaper coverage. That source trail is often the best way to move from designation summary to a fuller building history.

Plymouth Building gives later fieldwork and archives a stable site to keep circling back to.

Public Actions

Campaign / Petition Record

Ordered oldest to newest.

1899-1945

Development

Construction period recorded in city landmark data

Chicago's public landmark data records Plymouth Building as built in 1899-1945.

December 14, 2016

Designation

Chicago individual landmark designation

City of Chicago designated Plymouth Building as an individual landmark on December 14, 2016.

February 2026

Inventory

City landmark address list and data portal record

Plymouth Building remains listed in Chicago's public individual-landmark address list and open-data record.

Signals

Latest Google News

Latest 3 stories

Plymouth Building, Chicago, Illinois

Research article pages show a recent coverage slice. Paid subscribers can use Signals inside the workspace for longer results and additional follow-up tools around the place.

Sources

Source Trail

Chicago Landmark Name List 2025.6

institution

Use for official landmark status and naming.

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
Plymouth Building
Location
417 South Dearborn Street, Chicago, Illinois
Coverage
Exact

Key Facts

Region
Chicago, Illinois / Midwest
Place type
Commercial Building
Current status
Preserved
Address
417 South Dearborn Street
Built
1899-1945
Architect
Simeon B.Eisendrath; W. Scott Armstrong
Designated
December 14, 2016

Design / Planning Timeline

Simeon B.Eisendrath; W. Scott Armstrong
1899-1945

Milestone

Use as a starting point for confirming authorship against permits, drawings, and later landmark reports.

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