Tirilye is a town in Bursa Province, Mudanya, Turkey, situated 12 km (7.46 mi) west of Mudanya. It is a township along the Marmara Sea shoreline. The area, which was inhabited since the 5th century BC, was formerly known as Τρίγλεια, Trigleia or Βρύλλειον, Brylleion in Greek. When demand for the products of Southern Marmara from the ancient world increased, ports have been constructed in Kios (Gemlik), Kurşunlu, Apamea Myrlea(Mudanya), Siği (Kumyaka), and Trilye (Zeytinbağı) and the region boomed. The most important historical structure in Trilye(Triglia) is that of the Byzantine Haghioi Theodoroi Church, known today as the Fatih Mosque.