A number of old houses built in the nineteenth or early twentieth century that have been preserved in their original appearance are also worthy of mention. Among the three most important mosques of Milas, The Great Mosque dating from 1378 and Orhan Bey Mosque dating from 1330 were built when Milas was the capital of the Turkish principality of Menteşe. The slightly more imposing Firuz Bey Mosque was built shortly the first incorporation of Milas into the Ottoman Empire and bears the name of the city's first Ottoman administrator.