Sidi-Meskin, anciently known as Thunusuda, is a railway town, and archaeological site in the Gouvernorat of Jendouba, Northern Tunisia.
The historical importance becomes clear with the nearby great Roman cities of Bulla Regia and Chemtou.
The Medjerda valley became Roman after the Third Punic War about 146BC[4] and it quickly became an important region for agriculture,[5] with the rolling plains home to numerous Imperial estates.
The Valley fell to the Vandal Kingdom around 423 and for a century was ruled by the Arian kings until in 533 the Orthodox Byzantines replaced them.
[6] It was on the Medjerda river between Simitthu and Bulla Regia,[7] and like them both was the seat of an ancient bishopric, which survives today as a titular see of the Roman Catholic Church.