I'm headed to Italy soon and Castel Sant' Angelo is one of my stops while in Rome. Built in 117-138 AD by the Emperor Hadrian as his mausoleum, it was used as a Papal "hideout" or sanctuary in times of strife between the church and its adversaries. It is also feature prominently in the movie "Angels and Demons". One thing of note.... The whereabouts of Hadrian's remains is still a mystery.
"Castel Sant' Angelo" © Kathy Dunham 2009