Castel Sant'Angelo is an old mausoleum for a Roman Emperor. The building has sinece then played several roles and has a rich history. For more info on Castel St Angelo, visit: http://www.worldsiteguides.com/europe...
"..The beautiful Castel Sant'Angelo, also known as the Mausoleum of Hadrian, has a fascinating history. The latter name derives from its founder; the roman emperor Hadrian. The construction of this great building started in year 135 AD and finished just 4 years later."