This church was the physical and spiritual base for a multi-year sit-in campaign that changed the face of segregation in Oklahoma City. Constructed in 1921 by black architect and church member Russell Benton Bingham, Calvary Baptist Church is an imposing three-story brick building with twin towers capped by brick parapets. In the early 20th century it served as the religious and social center of Oklahoma City's black community. The sit-ins--or what were then called