Pergamon Bridge
The Pergamon Bridge is a Roman substruction bridge over the Selinus river (modern "Bergama Çayı") in the ancient city of Pergamon (today Bergama), modern-day Turkey. The wide structure, the largest of its kind in antiquity, was designed during Hadrian's reign (AD 117–138) in order to form a passageway underneath a large court in front of the monumental "Red Basilica" temple complex. The two intact tubes, which consist of supporting walls covered with barrel vaults, still serve their purpose to this day.
Gongylos
It is thought that the Greek dynasts of Pergamon were punished following the Peace of Antalcidas in 386 BCE for their support of the Greeks against the Achaemenids. However, by the mid-4th century BCE, the Achaemenid satrap Orontes again allowed the people of Pergamon to settle on the acropolis of their city. This lasted until the conquests of Alexander the Great, when Pergamon became part of the Macedonian Empire.