positioned on the east side of the building. The rest of the building has shops, a possible school a possible guild temple and a room that could have stored carriages. The floors and walls of the Bath of the Philosopher were decorated with marble in this structure. The building may have become the meeting place of a Neoplatonic philosophical school, since two portraits of the philosopher Plotinus were discovered here. Baths of the Jealous One The baths (V, V, 2), named after an inscription in a black-and-white mosaic found in an adjoining shop, were built in c. 50 C.E. and modified several times afterward, once during the Antonine period, then again in the first half of the 3rd century C.E. and finally in the 5th century C.E. The bath, like many in Ostia, is built into the urban fabric, which several shops surrounding the building. One of the bars is accessible both from the street and from the apodyterium. Several mosaics with marine themes can be seen throughout the structure (Nereid on a hippocamp in the changing rooms, an amorino riding a marine tiger in the cold bath). The palaestra can be reached from the heated rooms or a separate street entrance. Baths of the Swimmer The Baths of the Swimmer (V, X, 3) were built during the reign of Domitian between 89-90 C.E., The structure was renovated during the city-wide improvements under Hadrian and Antoninus Pius, which modifications occurring in between 180-200 C.E. and again between 230-250 C.E. In the end, the building was plundered and used as an amphorae dump. In the frigidarium is the namesake black-and-white mosaic of a city wall and a man swimming. The bathhouse was supplied by a two-story cistern on the northern wall of the building. It has been calculated based on the space of the suite of hot rooms that only about 50 people could use the bath at once, leading to an estimated 600 people per day. The bath excavations had a large impact on modern Italian Archaeology material study when Andrea Carandini divided the material up to be published on by his graduate students. Outside Main Excavated Area Palazzo Imperiale The so-called Imperial Palace may actually have been a multifunctional insula, as seen throughout Ostia. The remains are outside the main excavated area. The bathhouse aspect of the building was built between 145-150 C.E. and based on stamped fistulae (lead