Centre Square is an office complex in Center City, Philadelphia, Pennsylvania, United States. The complex consists of two concrete high-rise towers: the 417 feet Centre Square I (also known as Centre Square East) and the 490 feet Centre Square II (Centre Square West) — respectively, the 24th- and 15th-tallest buildings in Philadelphia. Designed by Vincent Kling & Associates in the 1960s, Centre Square opened in 1973.