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 Altar
In 1878, the German engineer Carl Humann began official excavations on the acropolis of Pergamon, an effort that lasted until 1886. The excavation was undertaken in order to rescue the altar friezes and expose the foundation of the edifice. Later, other ancient structures on the acropolis were brought to light. Upon negotiating with the Turkish government (a participant in the excavation), it was agreed that all frieze fragments found at the time would become the property of the Berlin museums.