Walls of the Acropolis of antique Pergamon

The Pergamon Acropolis, perched on a 300-meter hill above the valley of the Caicus River (modern Bakırçay), was one of the most fortified cities of antiquity. Its massive defensive walls, built to take advantage of the natural terrain, made the citadel virtually impregnable. In terms of strategic importance and architectural grandeur, the Pergamon Acropolis rivaled that of Athens, and its fortifications were considered masterpieces of Hellenistic military engineering.