What is the address of the building located above City Hall Station in Philadelphia, Pennsylvania? 
City Hall station (SEPTA): City Hall is a SEPTA subway station in Philadelphia, Pennsylvania. City Hall station (SEPTA):  It serves the Broad Street Line and is located in Center City Philadelphia underneath Philadelphia City Hall. Philadelphia City Hall: Philadelphia City Hall, built in 1901 and located at 1 Penn Square, is the seat of government for the city of Philadelphia, Pennsylvania.
1 Penn Square