Historedia
Person

Pope Sixtus IV

Events
6
Episodes
10
Years
1478–1484

Every event in Historedia whose sources name Pope Sixtus IV, with the role they cite and all of that event’s episodes. This is not a biography, and mentions are grouped by name, so two people with the same name can share this page.

Events and episodes

  1. Initiation of the Spanish Inquisition

    1478

    Role: Papal authority authorizing the Inquisition

    1. 1478 · SpainPapal Authorization

      Pope Sixtus IV authorized the Tribunal of the Holy Office of the Inquisition in 1478, providing the legal basis for its creation.

  2. Ottoman Invasion of Otranto and the Martyrs of Otranto

    1480–1481

    Role: Head of the Catholic Church

    1. 28 July 1480 · OtrantoOttoman Landing

      Ottoman fleet arrives near Otranto

    2. 14 August 1480 · Hill of Minerva, OtrantoExecution of Martyrs

      813 inhabitants executed for refusing conversion

    3. April 1481 · Papal StatesCall for Crusade

      Pope Sixtus IV calls for Italian crusade

    4. May–September 1481 · OtrantoLiberation of Otranto

      Christian forces recapture Otranto

  3. Papal Bull Aeterni Regis Grants Land to Portugal

    1481

    Role: Issuer of the papal bull

    1. 21 June 1481 · Papal StatesIssuance of Aeterni regis

      Pope Sixtus IV issued the bull on 21 June 1481, confirming the Treaty of Alcáçovas and granting Portugal territorial rights in Africa and the Indies.

  4. Papal Bull for Ascoli Piceno

    1482

    Role: Head of the Papal States

    1. 1482 · Ascoli PicenoSubmission to Papal Suzerainty

      Ascoli Piceno submitted to Papal suzerainty in 1482 after Sforza was ousted. The legacy claim of a specific bull granting self-government rights is not supported by the provided passages.

  5. Opening of the Sistine Chapel

    1483

    Role: Commissioner and Celebrant

    1. 15 August 1483 · Apostolic Palace, RomeConsecration of the Sistine Chapel

      Pope Sixtus IV consecrated the Sistine Chapel on 15 August 1483, celebrating the first mass for the Feast of the Assumption and dedicating it to the Virgin Mary.

  6. Accession of Pope Innocent VIII

    1484

    Role: Predecessor

    1. 12 August 1484 · RomeDeath of Sixtus IV

      Sixtus IV died on 12 August 1484 after a brief illness that began on 8 August.

    2. 29 August 1484 · RomeAccession of Innocent VIII

      Giovanni Battista Cybo became Pope Innocent VIII on 29 August 1484, succeeding Sixtus IV.

Sources

  1. Spanish Inquisition Wikipedia
  2. Pope Sixtus IV Wikipedia, revision of 2026-08-19
  3. Ottoman conquest of Otranto Wikipedia
  4. Aeterni regis Wikipedia, revision of 2026-06-17
  5. Sistine Chapel Wikipedia, revision of 2026-08-28
  6. Pope Innocent VIII Wikipedia