Aspendos was an ancient city in Pamphylia, Asia Minor, located about 25 miles east of the modern city of Antalya, Turkey. It was situated on the Eurymedon River about 10 miles inland from the Mediterranean Sea; it shared a border with Side. Aspendos is known for having the best-preserved theater of antiquity. With a diameter of 96 meters (315 ft), the theater provided seating for 7,000. The theater was built in 155. In order to keep with Hellenistic traditions, a small part of the theater was built so that it leaned against the hill where the Acropolis stood, while the remainder was built on vaulted arches.