The Diocese of Derbe is an ancient Bishopric located at Derbe in the Roman province of Galatia in Asia Minor, and in the ethnic region of Lycaonia. It flourished through the Roman and Byzantine empires, being dissolved on the invasion of the Seljuks at the Battle of Manzikert in 1071.The diocese was nominally refounded as a titular see of the Roman Catholic Church in the 17th century, although the area had never actually been catholic in profession.