The structure is built on a hillside according to Greek tradition.
Today the visitor enter to the building from the door on the front face which is added later on. In fact the orijinal entrance is from the vaulted paradoses situated on the two sides of the scene. Caeva is shaped as half circle and is divided into two with a vast diazoma.
There are 21 seats above and 20 below. In order for the audience not to have difficulty when they are seated stairs were made spreading to the top, while the stairs beginning from the orchestra stage below is 10, this number is 21 at the top beginning of the above diazoma.
The gallery with 59 stairs which thought to be made later on lies from the beginning of the top caeva to the end. Looking from an architectural perspective the vaulted gallery of the diazoma is in a supporter texture of top caeva. As a general rule of protocol; the lodges which are placed at the two entrances of the caevas are reserved for the family of empire and for the sacred virgins who has devoted themselves to the Roman god Vesta.
Beginning from the orchestra, the first line is reserved for senators, judges, ambassadors, second line for the other notables of the city. Other seats are open for common people. Women were usually having seat at the top of thegallery. From the names caved on the seats of the top caeva it is clearly understood that these seats were reserved for certain people.
The most attractive element of the theatre is it structure. On the first floor of this double-storied building which is made of piled stone there are five doors for the players to come on the scene. Of these doors the big one in the middle is known as porta regia, and the other four- placed two on the left and two on the right is known as porta hospitals. The small doors lined on the orchestra are belongs to the corridors of the cages of wild animals. From the remaining stones it is understood that triangle and half-circle shaped small sculptures and niches for the walls were placed on the ornamental walls.