Centre Square is one of the largest commercial properties in the Philadelphia Commercial Business District. Easily recognizable by both its glass-domed atrium and its "Clothespin" sculpture the property occupies an entire city block at 15th and Market Streets, in the heart of Center City. It consists of a 36-story East Tower, a 43-story West Tower, an atrium, and a glass ceiling galleria which includes retail shops, restaurants and a commuter concourse. More than 5,000 people work in the landmark designated complex, and some 20,000 people travel through its doors daily. Some other features include a first rate, 24-hour security, monitoring system and after hour card access. The complex contains approximately 1,848,148 total rentable square feet, of which 1,751,679 square feet is office space, 49,710 square feet is retail space, and 46,759 square feet is a parking garage that can accommodate 415 cars. This building is registered with the U.S. Green Building Council and is seeking LEED certification. This building was awarded an Energy Star label in 2010 and 2018 (83) for its operating efficiency.