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Chicago, Illinois
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Completed in 1893, the Monadnock Building was the largest office building in the world at the time, with 1,200 rooms.
It is one of the tallest load-bearing brick buildings ever constructed, with walls that are six feet thick at the base.
The building is considered a transition between traditional and modern architecture, featuring both load-bearing walls and steel frame construction.
The northern half was designed by Burnham & Root, while the southern half was completed by Holabird & Roche.
Its design is noted for its minimalistic approach, which was quite radical at the time of its construction.
It is a contributing property to the South Dearborn Street-Printing House Row North Historic District, recognized for its architectural significance.
It is named after Mount Monadnock in New Hampshire, reflecting a trend of naming buildings after mountains during that era.
Despite changes in ownership and renovations, it has remained an active office space since 1893.
The building features oriel bay windows, which were designed to maximize natural light and space.
It was designated a Chicago Landmark in 1973, recognizing its importance in the city's architectural heritage.
