The Baths of Trajan (Italian: Terme di Traiano) were Roman public baths in the Antico District of the city. During the early 16th century, it was possible to access the Golden Palace from the baths via at least one crawl space; this allowed the Followers of Romulus to use the palace as a lair. Their remains survive to this day.
The structure was built atop a section of Nero's ruined Golden Palace and was poetically intended for use by the commoners. In 537, the siege of the Goths destroyed most of the Roman aqueducts, and the Baths of Trajan were subsequently abandoned due to the loss of the water supply.