Oliger, Livarius. "Scala Sancta (Holy Stairs)."The Catholic EncyclopediaArchived 29 November 2021 at the Wayback Machine Vol. 13. New York: Robert Appleton Company, 1912. 31 December 2022 This article incorporates text from this source, which is in the public domain.
www.vatican.vaArchived 1 October 2022 at the Wayback Machine Stampa della Santa Sede: Zone extraterritoriali vaticani, 3 April 2001 (Italian). Retrieved 24 March 2014.
www.vatican.vaArchived 1 October 2022 at the Wayback Machine Stampa della Santa Sede: Zone extraterritoriali vaticani, 3 April 2001 (Italian). Retrieved 24 March 2014.
Oliger, Livarius. "Scala Sancta (Holy Stairs)."The Catholic EncyclopediaArchived 29 November 2021 at the Wayback Machine Vol. 13. New York: Robert Appleton Company, 1912. 31 December 2022 This article incorporates text from this source, which is in the public domain.