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.
Pergamon
The sanctuary of Hera Basileia ('the Queen') lay north of the upper terrace of the gymnasium. Its structure sits on two parallel terraces, the south one about 107.4 metres above sea level and the north one about 109.8 metres above sea level. The Temple of Hera sat in the middle of the upper terrace, facing to the south, with a 6 metre wide exedra to the west and a building whose function is very unclear to the east. The two terraces were linked by a staircase of eleven steps around 7.5 metres wide, descending from the front of the temple.