Gregory IX

(c. 1148—1241)

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'Gregory IX' can also refer to...

Gregory IX, Pope (c. 1170—1241)

Gregory IX (1148–1241)

Pope Gregory IX (1227–41)

Gregory IX (c.1148–1241)

Gregory IX (19 Mar. 1227)

Gregory IX (c.1148–1241)

Gregory IX (19 Mar. 1227–22 Aug. 1241)

Gregory IX, Pope (c.1170–1241)

Gregory IX (19 Mar. 1227–22 Aug. 1241)

The Papal Reform of the Eleventh Century: Lives of Pope Leo IX and Pope Gregory VII

Women in Contemporary France. Edited by Abigail Gregory and Ursula Tidd. Oxford, Berg, 2000. ix+227 pp. Hb £42.99. Pb £14.99.

The History of Medieval Canon Law in the Classical Period, 1140–1234: From Gratian to the Decretals of Pope Gregory IX

Gregory I. Halfond. Archaeology of Frankish Church Councils, AD 511–768. (Medieval Law and Its Practice, number 6.) Boston: Brill. 2010. Pp. ix, 299. $138.00

Gregory Mann. Native Sons: West African Veterans and France in the Twentieth Century. (Politics, History, and Culture.) Durham, N.C.: Duke University Press. 2006. Pp. ix, 333. $23.95

Gregory A. Waselkov. A Conquering Spirit: Fort Mims and the Redstick War of 1813–1814. (Dan Josselyn Memorial Publication.) Tuscaloosa: University of Alabama Press. 2006. Pp. ix, 414. $39.95

The Demographics of Empire: the Colonial Order and the Creation of Knowledge. Edited by Karl Ittmann, Dennis D. Cordell, and Gregory H. Maddox (Athens, OH: Ohio University Press, 2010. ix plus 292 pp. $64.95, hardcover)

Wilfried Hartmann, Kenneth Pennington, editors. The History of Medieval Canon Law in the Classical Period, 1140–1234: From Gratian to the Decretals of Pope Gregory IX. (History of Medieval Canon Law.) Washington, D.C.: Catholic University of America Press. 2008. Pp. xiii, 442. $64.95.


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Pope from 1227. He excommunicated Frederick II for his delay in fulfilling his promise to go on a crusade, and when he sailed unreconciled in 1228, proclaimed an interdict over his land and wherever he went. In 1230 he agreed to a treaty with the Emperor, but in 1239 he excommunicated him again and died while Frederick was besieging Rome.

A friend of St Francis of Assisi, he became Protector of the Franciscan Order in 1220, and it was largely from Dominicans and Franciscans that he recruited the full-time Inquisitors appointed from c.1233. In 1230 he commissioned Raymond of Peñafort to collect the Papal decretals of the last 100 years in the so-called ‘Liber Extra’ (published in 1234).

Subjects: Christianity.

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