The Baths of Diocletian were the largest public baths of Ancient Rome and could accommodate up to 3,000 people at the same time. They were erected in honor of the emperor Diocletian in 298-306. It housed sports halls, a library and even its own amphitheater, pools with warm and cold water, lounges and halls for symposiums.
The baths of Diocletian fell into decay in 537 after the destruction of the Marcius aqueduct by the barbarians. In the middle of the XVI century. they became a source of building material for the construction of Pope Sixtus V's villa and the
Church of Santa Maria degli Angeli.
Currently, the ruins of the baths belong to the
National Roman Museum, and you can view them during the tour.