The Domus Tiberiana was an Imperial Roman palace in ancient Rome, located on the northwest corner of the Palatine Hill. It probably takes its name from a house built by the Emperor Tiberius, who is known to have lived on the Palatine, though no sources mention his having built a residence. It was enlarged by the successors to Tiberius, and would have been the principal Roman residence of Tiberius, Caligula, Claudius, and Nero during the early part of his reign. Relatively little is known of the structure archaeologically, since the Farnese Gardens have occupied the site of the main level since the 16th century, making excavation difficult.