Recreation Park (known at various times as Union Park, 3A Park, and the Coliseum) was a sporting grounds and stadium that stood from 1865 to 1905 in Allegheny City, Pennsylvania, which was annexed in 1907 and became the North Side region of Pittsburgh. The park was bounded by Allegheny Avenue, Pennsylvania Avenue, Grant (now Galveston) Avenue, and Boquet (now Behan) Street. Wikipedia