Caelian Hill (c-750). The Caelian Hill is one of the famous Seven Hills of Rome, Italy. Under reign of Tullus Hostilius, the entire population of Alba Longa was forcibly resettled on the Caelian Hill. According to a tradition recounted by Titus Livy, the hill received its name from the Etruscan folk hero Caelius Vibenna, because he either settled there or was honored posthumously by his friend Servius Tullius. Other authors have linked the name to the Latin caelum, heaven. In Republican-era and Imperial Rome alike, the Caelian Hill was a fashionable residential district and the site of residences of the wealthy. This is attested to by a section of Pliny the Elder's Natural History,Who Was the First to Encrust the Walls of Houses at Rome with Marble. This expensive feat was achieved on the Caelian Hill by Mamurra, a soldier who served under Julius Caesar in Gaul, profited tremendously from corruption, and was accordingly mocked by Horace and Catullus. Jerome alleges that Marcus Aurelius was born on the Caelian Hill in 121. Archaeological work under the Baths of Caracalla have uncovered the remains of lavish villas complete with murals and mosaics. The Caelian is also the site of the Basilica of Santi Giovanni e Paolo and the ancient basilica of Santo Stefano Rotondo, known for its centralized, circular plan. A significant area of the hill is taken up by Villa Celimontana and its gardens.