Marmarica in ancient geography was a littoral area in Ancient Libya, located between Cyrenaica and Aegyptus. It corresponds to what is now the Libya and Egypt frontier, including the towns of Bomba, Timimi, Tobruk, Acroma, Bardiya, As-Salum, and Sidi Barrani. The territory stretched to the far south, encompassing the Siwa Oasis, which at the time was known for its sanctuary to the deity Amun. The eastern part of Marmarica, by some geographers considered a separate district between Marmarica and Aegyptus, was known as Libycus Nomus. In late antiquity, Marmarica was also known as Libya Inferior, while Cyrenaica was known as Libya Superior.