875 Lake Street, Oak Park, Frank Lloyd Wright architect built 1905-1908
The Unity Temple established Wright's renown the world over, and was built amid great controversy. Parishioners called the design "a blasphemy to God" or a "fortress".
Wright insisted that no one could understand his design until they worshipped in the finished church. Wright stayed home that first Sunday, but a trustee of the church called and said "You're right, Frank, it works".