Πέργαμος, -ου, ἡ (so Xen., Paus., al., but -ον, τό in Strabo, Polyb., and most writers, also in Inscr.; in NT the termination is uncertain) Pergamum, a city of Mysia: Refs Rev.1:11 2:12.† (AS)
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.
Literal: Pergamos = "height or elevation"
From G4444; fortified; Pergamus, a place in Asia Minor