A city in Byzacene (the middle east coast of Tunisia), modern Susah province. Located on a small peninsula extending out into the Mediterranean at the southern tip of the Gulf of Hammamet. It was was founded by Carthaginians or Tyrians c. 509 BCE. The second treaty between Carthage and Rome mentionned it as an ally of Carthage. In the Turkish era, Monastir became the capital of the Mansab (region) of Sahel, and became an important port and fortress - in 1864, the town hosted 11 consuls of European states.