Sede Vacante 1241
August 22, 1241—October 25, 1241
November 10, 1241—June 24, 1243
Documents concerning the Elections of 1241 and 1241-1243
- Bartholomaeus, scriba of Genoa, Annales, concerning the capture of the cardinals (May 3, 1241).
- Matthew of Paris, Chronica majora . selections related to the Elections of 1241 and 1241-1243
- Flores Historiarum, under the pseudonym 'Matthew of Westminster
- Ryccardus de San Germano, sub annis 1241, 1242, 1243 [MGH SS 19, 380-384]
- Letter of the Emperor Frederick II to Cardinal Colonna (1241)
- Letter of the Emperor Frederick, about his military successes in Spring, 1241
- Letter of Gregory IX to Genoa, counselling revenge (August 16, 1241).
- Letters of the Emperor Frederick II to the College of Cardinals during the second Election (Spring 1242)
