''Qui iustis causis'' is a papal bull issued by

Pope Innocent IV Pope Innocent IV ( la, Innocentius IV; – 7 December 1254), born Sinibaldo Fieschi, was head of the Catholic Church and ruler of the Papal States from 25 June 1243 to his death in 1254. Fieschi was born in Genoa and studied at the universitie ...

on 23 September 1243 authorising

crusades The Crusades were a series of religious wars initiated, supported, and sometimes directed by the Latin Church in the medieval period. The best known of these Crusades are those to the Holy Land in the period between 1095 and 1291 that were in ...

Livonia Livonia ( liv, Līvõmō, et, Liivimaa, fi, Liivinmaa, German and Scandinavian languages: ', archaic German: ''Liefland'', nl, Lijfland, Latvian and lt, Livonija, pl, Inflanty, archaic English: ''Livland'', ''Liwlandia''; russian: Ли ...

and

Prussia Prussia, , Old Prussian: ''Prūsa'' or ''Prūsija'' was a German state on the southeast coast of the Baltic Sea. It formed the German Empire under Prussian rule when it united the German states in 1871. It was ''de facto'' dissolved by an em ...

. Shortly after Innocent's election to the papacy, the

Teutonic Order The Order of Brothers of the German House of Saint Mary in Jerusalem, commonly known as the Teutonic Order, is a Catholic religious institution founded as a military society in Acre, Kingdom of Jerusalem. It was formed to aid Christians on ...

sought his consent for the suppression of the Prussian rebellion and for their struggle against the Lithuanians. It was reissued by Innocent and his successors in October 1243, March 1256, August 1256 and August 1257. When the bull was re-issued in March 1256, it was sent to Bishop Heidenreich of Chelmno and Bishop Henry of Courland, to support the Dominican's preaching for the Baltic crusade.

Notes

Sources

* *{{cite book , title=Preaching the Crusades: Mendicant Friars and the Cross in the Thirteenth Century , first=Christoph T. , last=Maier , publisher=Cambridge University Press , year=1994 13th-century papal bulls Documents of Pope Innocent IV Northern Crusades