castel sant`angelo fortress, castle of the holy angel, known as mausoleum of hadrian in historic city center of rome in italy

039 aelius ancient angel angelo angels antica antiquity architecture attraction baroque borgo bridge brown castel castle catholic centro christianity cityscape color demons emperor exterior facade fortress hadrian hadrianus historic history holy italia italian italiano italy landmark lazio lazium mausoleum monastery outdoor outside panorama panoramic passetto ponte publius renaissance roma roman rome sant shrine storico tiber tomb touristic travel