Hi-erapolis
(holy city), a city of Phrygia, situated above the junction of the rivers Lycus and Maeander, near Colossae and Laodicea mentioned only in Col 4:13 as the seat of a church probably founded by Epaphras.
Bibliography Information Smith, William, Dr "Definition for 'Hi-erapolis' Smiths Bible Dictionary". bible-history.com - Smiths; 1901.