CASTEL SANT'ANGELO & HADRIAN'S MAUSOLEUM: A THOUSAND-YEAR HISTORY In the Middle Ages, Hadrian's Mausoleum was transformed into an impregnable fortress, which withstood every siege for centuries, including that of the Landsknechts in 1527.The Mausoleum of Augustus was the first great dynastic tomb, and all the emperors from Augustus onward were buried there. The last one w... To read the full article you must log in or register. Login or register