Scala Regia (Latin pronunciation: [ˈskaːla ˈreːɡia] and Italian pronunciation: [ˈskaːla ˈreːdʒia]; English: Royal Staircase) is a flight of steps in the Vatican City and is part of the formal entrance to the Vatican. It was built by Antonio da Sangallo the Younger in the early 16th century, to connect the Apostolic Palace to St.