This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Scala Regia. Bronze Door Landing leading to the Portico of Saint Peter's Basilica Platform Pedestal of the equestrian statue of Emperor Constantine the Great first flight of stairs intermediate landing second flight of stairs intermediate half landing third flight of stairs leading to the Sala Regia Sala Regia Cappella Paolina