the divine power that over-rules the kings of the world. This theme is often repeated in Vatican artworks such as Giulio Romano's fresco of The Battle of Milvian Bridge, located in the Sala di Costantino ("Hall of Constantine") as well as the marble relief in St. Peter's of Algardi's Fuga d’Attila. Pope Clement IX later installed a statue of Charlemagne at the opposite end of the portico of St. Peter's Basilica, as a pendant to that of Constantine. See also List of works by Gian Lorenzo Bernini Index of Vatican City-related articles References Further reading Pevsner, Nikolaus (1963). An Outline of European Architecture. Penguin External links Scala Regia Apostolic Palace Gian Lorenzo Bernini buildings Vatican Museums