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Scala Regia (Latin pronunciation: [ˈskaːla ˈreːɡɪ.a]; English: "Royal Staircase") is a term referring to a number of majestic entrance staircases in Italian palaces plus some European palaces, including:

The Scala Regia of the Vatican, a flight of steps designed by Gian Lorenzo Bernini (1663–1666) to connect the Vatican Palace to St. Peter's Basilica.
Main staircase of Villa Farnese at Caprarola
Entrance to the Ducal Palace of Lucca
Entrance to House of Lords, Westminster, United Kingdom

Other staircase entrances include the Scala d'Oro in Venice.