Pergamon or Pergamum (Auncient Greek: τὸ Πέργαμον or ἡ Πέργαμος) wis a rich an pouerfu auncient Greek ceety in Aeolis. It is locatit 26 kilometres (16 mi) frae the modren coastline o the Aegean Sea on a promontory on the north side o the river Caicus (modren-day Bakırçay) an northwast o the modren ceety o Bergama.