Pergamon
Pergamon's other notable structure is the great temple of the Egyptian gods Isis and/or Serapis, known today as the "Red Basilica" (or "Kızıl Avlu" in Turkish), about south of the Acropolis at (39 7' 19" N, 27 11' 1" E). It consists of a main building and two round towers within an enormous "temenos" or sacred area. The temple towers flanking the main building had courtyards with pools used for ablutions at each end, flanked by stoas on three sides. The forecourt of the Temple of Isis/Sarapis is still supported by the Pergamon Bridge, the largest bridge substruction of antiquity.
Attalid dynasty
In the interior of the Pergamon Altar there is a frieze depicting the life of Telephus, son of Herakles. The ruling dynasty associated Telephus with its city and used him to claim descent from the Olympians. Pergamon, having entered the Greek world much later than its counterparts to the west, could not boast the same divine heritage as older city-states and so had to cultivate its place in Greek mythology retroactively.