The Museo Archeologico dei Campi Flegrei houses some of the archaeological finds from the area. It's set in the atmospheric Castello di Baia, built late in the 15th century over the ruins of a Roman fort. The castle was given its present appearance between 1538 and 1550. There's a reconstructed sacellum (shrine) used for the cult of the emperors, represented here in flattering statues of Vespasian and Titus; the bronze equestrian statue of the unpopular Domitian was reworked to depict his successor Nerva after he had been deposed. On the upper level is a reconstruction of a nymphaeum that was excavated in the 1980s but lies, together with much of Baiae, under six metres of water. The statues, however, have been brought to the surface, and include a headless Odysseus plying Polyphemus (statue not found) with wine, a favourite theme of Roman sculptors. The rest of the castle is given over to a display of archaeological finds from across the Phlegrean Fields. Few of the explanatory panels are in English.