Easton's Bible Dictionary (1897)
Sacred city, a city of Phrygia, where was a Christian church under the care of Epaphras (Col. 4:12, 13). This church was founded at the same time as that of Colosse. , “Cotton Castle”, from the white appearance of the cliffs at the base of which the ruins are found.
Smith's Bible Dictionary (1863)
(holy city), a city of Phrygia, situated above the junction of the rivers Lycus and Maeander, near Colossae and Laodicea mentioned only in (Colossians 4:13) as the seat of a church probably founded by Epaphras.
Hastings' Dictionary of the Bible (1898) & Schaff's Bible Dictionary
HIERAP'OLIS(sacred city),a city in Proconsular Asia, Col 4:13, near the river Lycus, and in sight of Laodicea, which was about 5 miles to the south. It stood on a high bluff, with a high mountain behind it. In the city was the famous temple of Pluto, remains of which are still to be seen. The ruins of the city are extensive, among which are the remains of temples, churches, a triumphal arch, a theatre, gymnasium, baths, and highly ornamented sarcophagi.
Hierapolis was celebrated for its warm springs, which hold in solution carbonate of lime, depositing incrustations on anything with which the waters come in contact. It is now called Pambouk Kalessi.
Hitchcock's Bible Names (1869)
holy city