The Commerce Building on Okmulgee's Council House Square. It stands as a striking architectural landmark. Built in 1921, this Beaux Arts structure was erected during Okmulgee’s early 20th century oil boom and remains the tallest and most grandiose commercial building from that era. It features an ornate terra cotta exterior, detailed pilasters, frieze work, and classical proportions. The structure spans seven floors, a mezzanine and a full basement. It’s located in the Okmulgee Historic District, which is listed on the National Register of Historic Places, and is a defining symbol of Okmulgee’s rich historical identity.