later the baths used a brick-on-block construction. This expansion added apartments and shops to the bath complex. The bath complex’s water was supplied by a large cistern, which was the only above ground water reservoir in the city. Auditoria The academic complex consists of at least twenty audioria, or lecture halls, split into two groups. These would have served as a "university", or place of higher education, and serve as archaeological confirmation of the abundance of study of rhetoric, philosophy, and medicine in Alexandria from the 5th to 7th centuries AD. Their construction began with the other public works in the 4th century. There may be more auditoria, but only twenty have been excavated as of 2010. The two groups are divided by the passage to the bath complex, and it is likely that there are more groups across the street, but outside of the excavation area. Although most of the auditoria have the same orientation along the north-south axis; they differ in size and arrangement. All auditoria feature stone benches, with most having two or three benches along the walls or a horseshoe arrangement. Capacity was generally 20–30 students per lecture hall, with facilities comfortably supporting a total of 500–600 students. Theatre The theatre is a small Roman theatre used for various forms of entertainment. It was constructed in the 4th century and ran until the early 7th century, with a remodeling around 500. Its early use may have been for city council meetings as well as entertainment. Graffiti in the seats from the 6th century shows support for the Blue and Geen factions, popular teams of charioteers, though the theatre was not large enough for racing. The exact forms of entertainment at the theatre are unknown, but there is evidence for musical performances and wrestling. After the construction of the academic complex, the theatre may have also hosted academic activities such as public orations and rhetorical speeches. The construction of the theatre is an extended hemicycle with raked auditorium seats. The seats are made of marble recycled from older structures. The walls and vestibule are made of limestone. At its top are a row of unmatched columns, recycled from other structures. Houses In the Early Roman Period, from the 1st–3rd century AD, Kom el-Dikka was occupied by large villas known for their elaborate mosaic floors. In the western part, three villas have been preserved. The destruction of the