The United States Post Office and Courthouse, in Columbus, Ohio was built during 1884-1887. The building served as a courthouse of the United States District Court for the Southern District of Ohio from its completion in 1887 until 1934, when the court moved to the Joseph P. Kinneary United States Courthouse. Also known as Old Post Office, it was listed on the National Register of Historic Places in 1973.It is a three-and-a-half-story building. It was expanded to three times its original size during 1907-1912.