Keystone Building, Prairie School office building in Aurora, US
The Keystone Building spans 165 feet on Stolp Avenue, featuring individual shops on the ground floor and identical exteriors across three upper floors.
Built in 1923, this structure designed by George Grant Elmslie became part of the National Register of Historic Places in 1980 for its architectural merit.
The building incorporates organic terra cotta details with blue and gold coloring, reflecting design elements influenced by architect Louis Sullivan.
Located at 30 South Stolp Avenue, the structure contains multiple retail spaces with separate entrances and office areas connected by an elevator system.
The Keystone Building represents the largest private office structure designed in Prairie School style, with polished terrazzo floors throughout its interior spaces.
Location: Aurora
Architectural style: Prairie School architecture
GPS coordinates: 41.75722,-88.31583
Latest update: September 23, 2025 14:25
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