Historical biography archive · Updated 2026-11-03

Gregory Boncompagni Biography and Timeline

Follow Gregory Boncompagni through 1 dated historical records for Italy.

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Gregory Boncompagni, historical timeline

A chronological timeline drawn from matching World History Database records.

1Distinct records

1 of 1Page

1582–1582Years on this page

1582

24 February 1582

Papal Bull

Pope · Pope of the Roman Catholic Church · Rome · Religion / Roman Catholic Church

Issues Inter gravissimas, introducing the Gregorian calendar reform

Role range: 1572-1585

Records, sources and methodology

These dates and descriptions come from the historical_events database. Exact duplicate records have been collapsed. Names are grouped by the country, Name 2 and Name 1 fields; records with missing Name 2 cannot be reliably assigned to an individual biography. Check the underlying sources before formal citation.