The Palatine Hill is one of the seven hills of Rome , located between the Velabro and the Roman Forum, and is one of the oldest parts of the city. The site is now a large open-air museum and can be visited during the day. The entrance is located in via di San Gregorio, or you can climb the Palatine Hill by entering the Roman Forum and then going up to Clivo Palatino, to the right of the Arch of Titus.