The Federal Building, also known as the Century Post Office, is a historic building located on Fayetteville Street in Raleigh, Wake County, North Carolina. It was the first Federal Government project in the South following the Civil War. Construction of the building began in 1874 and was completed in 1878. The building's Second Empire design was by Alfred B. Mullett whose more famous works included the Old Executive Office Building located near the White House. The Federal Building was listed on the National Register of Historic Places in 1971 and is a Raleigh Historic Landmark.