Near Baiae was the villa resort of Bauli, so called from the 1 30aata (stalls) in which the oxen of Geryon were' concealed by Hercules. By some it is identified with the modern village of Bacoli (owing to a presumed similarity to the ancient name), 2 m. S.S.E. of Baiae; by others with the Punta dell' Epitaffio, 1 m. N.E. of Baiae (see G. B. de Rossi in Notizie degli scavi, 1888, 709). At Bauli, Pompey and Hortensius possessed villas, the former on the hills, while that of the latter, on the shores of the Lacus Lucrinus, was remarkable for its tame lampreys and as the scene of the dialogue in the second book of Cicero's Academica Priora; it afterwards became imperial property and was the scene of Agrippina's murder by Nero. It was from Bauli to Puteoli that Caligula built his bridge of boats.
Of the once splendid villas and baths of Baiae and its district, the foundations of which were often thrown far out into the sea, considerable, though fragmentary, remains exist. It is not, as a rule, possible to identify the various buildings, and the names which have been applied to the ruins are not authenticated. At Baiae itself there exist three large and lofty domed buildings, two octagonal, one circular, and all circular in the interior, of opus reticulatum and brick, which, though popularly called temples, are remains of baths or nymphaea. The Punta dell' Epitaffio also is covered with remains, while at Bacoli are several ruins - to the north of the village a small theatre, called the tomb of Agrippina; under the village the remains of a large villa; to the E. the remains of a large water reservoir, the so-called Cento Camerelle; to the S. another with a vaulted ceiling, known as the piscina mirabilis, measuring 230 by 85 ft. The villa of Marius, which was bought by Lucullus, and afterwards came into the possession of the imperial house, was the scene of the death of Tiberius. It is sometimes spoken of as Baiana, sometimes as Misenensis, and is perhaps to be sought at Bacoli (Th. Mommsen in Corp. Inscrip. Latin., x., Berlin, 1883, 1748), though Beloch inclines to place it on the promontory S. of Misenum, and this perhaps agrees better with the description given by Phaedrus.
Baiae was devastated by the Saracens in the 8th century and entirely deserted on account of malaria in 1500.
See J. Beloch, Campanien (2nd ed., Breslau, 1890), 180 seq.