Diocletian's baths were so enormous that today, they contain two churches, large parts of a Carthusian monastery and a major museum.
Michelangelo used the vast tepidarium (hot baths) as the shell for his church of Santa Maria degli Angeli, and the Museo Nazionale Romano, Rome's National Museum, fills another section with treasures of antiquity: Greek and Roman sculpture, pre-Christian and later sarcophagi, and beautiful mosaics and frescoes.
The late-16th-century church of San Bernardo alle Terme was built in a rotunda at the corner of the baths; its dome is like that of the Pantheon, but only half its size.
