Pergamos = "height or elevation"

 1) a city of Mysia Minor, in Asia Minor, the seat of the dynasties of
    Attalus and Eumenes, famous for its temple of Aesculapius and the
    invention and manufacture of parchment. The river Selinus flowed
    through it and the Cetius ran past it. It was the birthplace of
    the physician Galen, and had a great royal library. It had a
    Christian church.