Tirilye is a town in Bursa Province, Turkey, situated 12 km west of Mudanya. It is a country along the Marmara Sealine. The area, which was inhabited since the 8th 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, Kurşunlu, Apamea Myrlea, Siği, and Trilye and the region boomed. The most important historical structure in Trilye is that of the Byzantine Haghios Stefanos Church, known today as the Fatih Mosque. Mudanya, a residential and commercial development in this township is under state protection as a historical site.
Trilye has been an important religious center for Greek Orthodox Christians during Byzantine Empire. Trilye is a first level protected area since 1981 because of the Byzantine and Ottoman architectural monuments and is considered as an open-air museum thanks to the historical buildings and houses.
Wikipedia https://en.wikipedia.org/wiki/Tirilye
Coordinates 40°23'33.881" N 28°47'46.406" E