This the way the courthouse and post office appeared when it was first constructed in 1915. Today Charles R. Jonas Federal Building is an historic two-story, limestone structure in the neo-classical design. It is located at 401 West Trade Street, in Charlotte with an addition that was built in 1934. At various times it has served as a courthouse of the United States District Court for the Western District of North Carolina, and a United States post office. In 1975, the building was renamed in honor of long-serving North Carolina Congressman Charles R.