several arches, and with sculptures in the water. Other sources suggest a temple was built on the island, namely a temple of Minerva. The elaborate rooms surrounding the peristyle alternated between open and closed spaces, suited to public use and perhaps several social groups. On its southwest side the walls stand to a considerable height (after partial reconstruction in the 1930s) with several rooms around a semicircular hall.

The courtyard complex was reserved for the private quarters of the emperor