Hadrian's mausoleum turned papal fortress: secret corridors, panoramic terraces, and two thousand years of reinvention.
Explore → Get Early AccessA building with four lives — imperial tomb, papal fortress, Renaissance apartment, prison — stacked in one drum on the Tiber, with the city's best bridge in front and a terrace view Puccini put in an opera.
Hadrian built it as his mausoleum (139 AD); a fortified corridor from the Vatican — the Passetto — let popes flee here, most famously Clement VII during the 1527 Sack while his Swiss Guard died buying time.
Tosca leaps to her death from this terrace in Puccini's finale. The angel on top commemorates a plague-ending vision from 590 AD — the current bronze is the sixth angel; a marble predecessor stands wounded in the courtyard.
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