Hierapolis (Phrygia) is located in Turkey in the territory of Pamukkale-Denizli. The city was known in antiquity for the cult of Cyble, patron goddess of the colony since its foundation. Hierapolis experienced a period of extraordinary prosperity both economically and politically throughout the 2nd century A.D. and into the early years of the 3rd century A.D., corresponding to the phase of monumentalization of the city. On the hill overlooking the east of the city is an imposing octagonal building, built in the late 4th and early 5th centuries A.D, erected as a 'martyrion' in honour of Saint...