Aspendos or Aspendus was an ancient Greco-Roman city in Antalya province of Turkey. The city is located 7 kilometres northeast of central Serik in Antalya Province of Turkey. Aspendos is known for having the best-preserved theatre of antiquity. With a diameter of 96 metres, the theatre provided seating for 12,000 attendants. The theatre was originally built in 155 AD by the Greek architect Zenon, a native of the city. It was periodically repaired by the Seljuqs, who used it as a caravanserai, and in the 13th AD century the stage building was converted into a palace by the Seljuqs of Rum.