William Sidney Pittman (April 21, 1875 – March 14, 1958) was an American architect who designed several notable buildings, such as the Zion Baptist Church and the nearby Deanwood Chess House in the Deanwood neighborhood of Washington, D.C.[1] He was the son-in-law of Booker T. Washington.

Pittman was born April 21, 1875, in Montgomery, Alabama to an ex-slave laundress and a prominent white man of the city.

[2][3] At the age of 17 Pittman attended Tuskegee Institute, where he completed programs in woodwork and architectural-mechanical drawing in 1897.

[2] He was awarded a scholarship to attend the all-white Drexel Institute in Philadelphia,[3] where he completed the five-year architecture and mechanical drawing program in only three years, graduating in 1900,[2][4][unreliable source?]

Pittman won a federal commission for the Negro Building at the Tercentennial Exposition at Jamestown, Virginia in 1907.