Easton's Bible Dictionary: M. G. Easton, M.A., D.D.
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. It now bears the name of Pambuk-Kalek, i.e., "Cotton Castle", from the white appearance of the cliffs at the base of which the ruins are found.