Anicetus was a Syrian from Emesa. He became pope about 155 and actively opposed Marcionism and Gnosticism. His pontificate saw the appearance of the controversy between East and West over the date of Easter. St. Polycarp, a disciple of John, is reported to have visited him in Rome about the dispute, which was to accelerate and grow more heated over the following centuries. Excellent content provided by https://www.catholic.org/.