Thyatira

"A city of Asia Minor, on the borders of Lydia and Mysia. Its" "modern name is Ak-hissar, i.e., "white castle." Here was one of" "the seven churches (Rev. 1:11; 2:18-28). Lydia, the seller of" "purple, or rather of cloth dyed with this colour, was from this" city (Acts 16:14). It was and still is famous for its dyeing. "Among the ruins, inscriptions have been found relating to the" guild of dyers in that city in ancient times.

Definition of Thyatira:
"a perfume; sacrifice of labor"