Uthina, also known as Oudna, is an ancient Roman city located approximately 30 kilometers south of Tunis, Tunisia. Established as a colony for veterans of Legio XIII Gemina during Emperor Augustus's reign, it flourished in the 2nd century. The site features a well-preserved amphitheater, partially dug into a hillside, which could accommodate about 16,000 spectators. Visitors can also explore the Capitol, vaulted chambers from the Roman and Byzantine periods, and extensive cisterns that once supplied water to the city. The archaeological site offers insights into Roman urban planning and architecture in North Africa.