In 155 AD, during the Roman period in Turkey, an amphitheatre was built in the city of Antalya, more than 45 kilometers east, named "Aspondos". Today, it stands still, one of the most preserved ancient Roman theaters in the world. The theatrical fan-shaped auditorium has a high barrier, with eight up and down stairways. There are walkways in the middle of the 41-row stands for easy lateral movement. The highest part has arched corridors for easy transportation. The stage is located at the dot and the surrounding area. The stage is a music pool between the auditorium and the auditorium. The stage is followed by a rectangular building with a corridor. The faade facing the audience is the background of the stage. The design of is very scientific. The visual and auditory effects of the audience are excellent. You can see the performance on the stage from any position. The semi-circular stands are equal to the rectangular buildings, forming an echo effect, so that the audience can clearly I heard the voice of the actor. Ten years ago, the government decided to repair the theater and perform performances. Nowadays, the Antalya Opera Festival and Art Festival is held every summer, and many famous artists in the world have sang in this ancient theater.