Uchi Maius (Henchir Douamis) is an archaeological site located in Béja Governorate, Tunisia. It was founded by Numidians in the 5th century BC. The site became under Roman control after the defeat of the Numidian king Jugurtha in 104 BC. Uchi Maius was granted the title of Roman colony in 230 AD by emperor Severus Alexander and became later the seat of a bishopric in the 5th century AD. The ruins include: Arch of Severus Alexander, Arch of Gordian III, Forum, Bathes, Theatre, Temple and Basilica.