The rectangular building of the Library comprises a Corinthian propylon on the west side, an open peristyle courtyard, three projecting conches on each of the long sides, a library, study and lecture halls.
The most important monuments of the site are:
Quatrefoil Building. The building with the four apses, dated to the 5th century A.D., was an Early Christian church with a peripteral narthex, exonarthex and a wide peristyle atrium on the west side.
Church of Megale Panaghia. The first church was a three-aisled basilica, built in the 7th century A.D. on the ruins of the quatrefoil building which had been destroyed in the 6th century A.D. The basilica was in its turn destroyed in the 11th century A.D. and a single-aisled church with a chapel to the north was erected in its place. It survived for centuries but was burnt down in 1885.
Ruins of a church. The north wall and remains of the sanctuary are preserved. The church lies to the north of the quatrefoil building and dates from the 17th century A.D.