Franciscans
Innocent III appoints the future Pope Gregory IX protector of the Franciscans
Role range: 1227-1241
Historical biography archive · Updated 2026-11-03
Gregory IX Biography and Timeline
Follow Gregory IX through 13 dated historical records for Italy.
Gregory IX, historical timeline
A chronological timeline drawn from matching World History Database records.
13Distinct records
1 of 1Page
1209–1241Years on this page
1209
1227
Pope
Appointed Pope
Role range: 1227-1241
1228
Invasion of Empire
Pope Gregory IX invades the lands of Frederick II, the "non-cxhristian" king
Role range: 1227-1241
1229
Excommunication
Frederick II is excommunicated by the Pope Gregory IX
Role range: 1228-1229 – 1227-1241
1231
Rule of Prussia
Pope Gregory IX takes control of Prussia & leases it to the Teutonic Knights
Role range: 1227-1241
Teutonic Knights
Pope Gregory IX takes control of Prussia & leases it to the Teutonic Knights
Role range: 1227-1241
1233
Inquisition
Orders the Dominicans in France to undertake the inquisition for heresy
Role range: 1227-1241
1239
Declaration of War
Gregory IX declares a Crusade against Frederick II
Role range: 1227-1241
Excommunication
Frederick II is excommunicated
Role range: 1227-1241
1241
Death of Gregory IX
Death of Pope Gregory IX, age 94
Role range: 1227-1241
Invasion of Rome
Frederick II advances on Rome
Role range: 1227-1241
Siege of Genoa
Frederick II captures a large delegationof French prelates off Genoa
Role range: 1227-1241
Synod
Calls a Synod to depose Frederick II
Role range: 1227-1241
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.