Graham, Anderson, Probst & White

Also known as GAP&W, the firm was founded in 1912 in Chicago, and remained active until 2006, when it finally closed its doors.

GAP&W is not only key in the evolution of Chicago's architecture because of the buildings they designed, which were many and nothing short of cutting-edge for their time, but also because two of their architects, Hubert Burnham and Daniel Burnham, eventually started their own practice, which became Burnham Brothers, yet another of the most influential firms the city has ever seen.

The firm's style evolved according to the times. Their first buildings had clear Beaux-Arts inspirations, but they eventually embraced the arrival of Art-Deco, as well as neogothic and neoclassicism.