Metropolis of Pergamon
The Metropolis of Pergamon () was an ecclesiastical territory (diocese) of the Ecumenical Patriarchate of Constantinople in western Asia Minor, modern Turkey. Christianity in the city of Pergamon (modern Bergama), was introduced already from 1st century AD, while the local Christian community comprised one of the seven Churches of Asia mentioned at the Book of Revelation, written by John of Patmos. The bishopric of Pergamon was twice promoted to a metropolis: during the 13th–14th centuries, as well as for a short period in 1922. Today the "Metropolis of Pergamon and Adramyttium" is the see of a titular metropolitan.
Pergamon
After the Sack of Constantinople in 1204 during the Fourth Crusade, Pergamon became part of the Empire of Nicaea. When Emperor Theodore II Laskaris () visited Pergamon in 1250, he was shown the house of Galen, but he saw that the theatre had been destroyed and, except for the walls which he paid some attention to, only the vaults over the Selinus seemed noteworthy to him. The monuments of the Attalids and the Romans were only plundered ruins by this time.