In the district of Kom El Dekka, lies the Roman Theatre which was built in the 4th century and remained in use for the following three centuries. The theatre was discovered in 1960 during the construction of an administrative building. It is believed that Alexandria had 400 theatres but this is the only one remaining. The whole structure is surrounded by two brick walls. The theatre itself has the shape of a horseshoe, with 13 rows of marble seats, numbered with Greek letters. In ancient times, it had 17 rows with a capacity to contain nearly 800 people. The stage still has some of its mosaic paving. Beneath the theatre, there are rooms and passages that were used by the actors. The columns and capitals scattered around the theatre, once held the dome that covered the structure. In early Christian Period, the site was converted into a church. Remains of lecture halls were found around the theatre and in the nearby there are remains of cisterns and gymnasium.At the site, there is an open museum with objects coming from many places in the city, among which are capitals, granite columns, Christian altars, statues, and sphinxes, all date back to several periods.