reveals that Caligula helped the city; under Vespasian, Philadelphia received his cognomen, Flavia. Under Caracalla, Philadelphia housed an imperial cult. Its coins bore the word Neokoron (literally, "temple-sweeper", caretaker of the temple). A small theatre, located at the northern edge of Toptepe Hill, is all that remains of Roman Philadelphia. Philadelphia in the Book of Revelation Although several ancient cities bore the name of Philadelphia, it is generally agreed to be the one listed among the seven churches written to by John in the Book of Revelation. Philadelphia is listed as the sixth church of the seven. A letter specifically addressed to the Philadelphian church is recorded in (). The city's history of earthquakes may lie behind the reference to making her church "a pillar in the temple" (). Aside from the fact that Smyrna was warned of temptation lasting "ten days", and Philadelphia was promised a total exemption, or preservation, from temptation, Philadelphia shares with Smyrna the distinction of receiving nothing but praise from Christ. That explains why modern Protestant churches sometimes use "Philadelphia" as a component in the local church's name as a way of emphasizing its faithfulness. Byzantine Philadelphia Philadelphia was a prosperous Byzantine city that was called the "little Athens" in the 6th century AD because of its festivals and temples. Presumably, that indicates that the city was not entirely converted to Christianity. Ammia, the Christian prophetess, was from Philadelphia, however. In about 600, the domed Basilica of St. John was built, remains of which are the main archaeological attraction in the modern city. The Byzantine walls that once surrounded the city have all but crumbled away. A few remnants are still visible at the northeast edge of town, near the bus stand. The city was taken by the Seljuk Turks in 1074 and 1093–1094. In 1098, during the First Crusade, it was recovered by Byzantine Emperor Alexios I. In the 11th to the 15th centuries AD, it was the seat of the doux (governor) and stratopedarches (military commander) of the Thrakesion theme. It was the centre of several revolts against ruling Byzantine emperors: in 1182, led by John Komnenos Vatatzes, and 1188–1205 or 1206, led by Theodore Mangaphas, a local Philadelphian, against Isaac II Angelos. At that time, the bishopric of Philadelphia was promoted to metropolis. In the 14th century, Philadelphia was made the metropolis of Lydia by the Greek Orthodox patriarch of Constantinople, a