Mausoleum of Hadrian
The Mausoleum of Hadrian, or Castel Sant'Angelo, has to be one of the best museums in Rome as old as 1,900 years. In the Middle Ages, it was significantly renovated.
Currently, it houses a museum namely the Museo Nazionale di Castel Sant’Angelo. Besides appreciating the magnificent structure of the castle, you can find some rare collection of Medieval weaponry and Renaissance paintings.