[1] Built between 1931 and 1935, this historic structure is a six-story, steel frame building that was clad in limestone and designed in the Art Deco-style.

The building had been designed with a flat roof with underfloor heating to prevent snow and ice.

It also had take-off ramps, radio and weather reporting equipment, and fuelling and maintenance facilities.

[4] when main distribution center activities moved to a new facility adjacent to the Philadelphia International Airport.

The building has been converted into office space, including the regional headquarters of the Internal Revenue Service.