United States Post Office-Main Branch is a historic post office building located in the University City neighborhood of Philadelphia, Pennsylvania. It is located across from Amtrak's 30th Street Station. It was built between 1931 and 1935, and is a six-story, steel frame building clad in limestone in the Art Deco-style. It measures 386ft wide and 455ft long. The facility closed on September 29, 2008 when main distribution center activities moved to a new facility adjacent to the Philadelphia International Airport. A new retail location was opened nearby at 3000 Chestnut Street.The building has been converted into office space, including the regional headquarters of the IRS.It was added to the National Register of Historic Places in 2005.
