Gregory I's vision and the castle's name

The castle's most famous legend dates from 590 AD: during a procession praying for the end of the Plague of Justinian, Pope Gregory I saw atop the mausoleum of Hadrian an archangel sheathing a sword, a sign that the pestilence was about to end. From that moment the structure changed its name: no longer the Moles Hadriani but Castel Sant'Angelo — the Castle of the Holy Angel.

The vision is almost certainly legendary, but its historical effect was real: the building acquired a sacred aura that preserved it from systematic demolition for centuries.

The only papal treasure to survive the Sack of 1527

During the Sack of Rome (6 May 1527), Charles V's imperial troops plundered churches, palaces and the Vatican itself. Castel Sant'Angelo remained the only inviolable place: it held the Holy See's most precious documents, jewels and part of the pontifical treasury. When Clement VII fled the Vatican through the Passetto in his liturgical vestments, he took with him the keys to certain chests kept inside the castle.

Five angels: from Hadrian to Verschaffelt

At least five angels or symbolic figures have succeeded one another atop the building:

  1. Hadrian's gilded equestrian statue (~134–537) — toppled during the Gothic siege
  2. Unidentified figure in the Middle Ages — probably wooden, not survived
  3. Marble angel by Raffaello da Montelupo (1536–1544, now in the Courtyard of the Angel) — commissioned by Paul III
  4. Bronze angel by Giacomo della Porta (1579) — struck by lightning in 1610 and damaged
  5. Bronze angel by Pieter Verschaffelt (1752) — the current one, still watching over the summit

The Bell of Mercy

Still present on the terrace today, one of the three historic bells of the castle: the Bell of Mercy (Campana della Pietà), which was rung on the evening before capital executions. The condemned man who heard it knew that he would die the following day. Since 1870, with the end of the Church's temporal power, the bell has no longer been rung for this purpose.

Cellini's escape: technical details

Benvenuto Cellini's escape (1539) is one of the most thoroughly documented episodes by the man himself in his Autobiography. Cellini described in minute detail:

  • Descending from his cell through a window forced open with a knife
  • The knotted sheets used to lower himself approximately 15 metres
  • A scuffle with a sentry at the final stretch
  • A broken ankle on the last landing
  • Crawling to the castle of a friend where he was hidden

The story is considered substantially true, although historians are mildly sceptical about the acrobatic proportions Cellini described.

The legend of the hidden treasure

A persistent local legend holds that the castle's underground rooms still conceal part of the papal treasury never recovered: coins, chalices and liturgical objects brought to safety during the many political crises. Twentieth-century excavations found nothing exceptional, but the legend refuses to die.

The angel symbol and Italian history

The sword-sheathing angel has become so powerful a symbol that it appears in unexpected contexts:

  • Numerous Roman families with the surname Castel or Angelo claim their origin in the monument's medieval nickname
  • During World War I the Italian government used the image of the illuminated castle at night in war propaganda as a symbol of the "Third Rome"
  • The castle silhouette appears on countless Roman souvenirs, heraldic emblems and official documents

The castle and music

Beyond Tosca, the castle appears in surprising musical works:

  • Giacomo Carissimi, a seventeenth-century Roman composer, is said to have performed private concerts in the castle's loggias for cardinals
  • Hector Berlioz's Te Deum makes explicit reference to the castle in the stage directions

With a private driver

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Frequently Asked Questions

Is Gregory's vision historically documented? It is mentioned in medieval texts but not in sources contemporary with the event. Historians consider it an edifying legend rather than a verifiable historical fact.

Did Cellini really escape? The first escape attempt (1538) is historically confirmed; he was recaptured and remained in prison until 1539. The successful escape is documented in his Autobiography.

Is the hidden-treasure story true? There is no documentary evidence of a systematic hidden treasure. Legends about treasures in medieval castles are a widespread literary trope.

Article no. 119 — TIER S — MON-06 Castel Sant'Angelo Type: HISTORICAL/PRACTICAL Words: ~800

See also