Pergamon in an ancient Greek city in modern-day Turkey. It is home to the second largest library in the ancient world, the Theatre of Anatolia, the monumental Altar of Zeus and the Roman Medical Center ruins of Asklepion (where the great physician Galen worked). Pergamon was cited in the book of Revelation as one of the seven churches of Asia where Satan dwells and where his throne, The Great Altar of Pergamon, resides.
The Attalid, a Greek dynasty, ruled the city of Pergamon in 281BC following the collapse of the Kingdom of Thrace. Big supporters of Rome, the Attalids often allied with them during various wars and were rewarded handsomely. The Attalids were popular rulers supporting the growth of towns and allowing them relative independence. The Acropolis of Pergamon was modeled on the Acropolis in Athens.