Honorius III, Pope. [Letter to Ingeborg of Denmark, queen of France, 1226 (2)] in Recueil des historiens des Gaules et de la France 19: 771

[Letter from Pope Honorius III to Ingeborg of Denmark, queen of France]
Honorius takes Ingeborg under the protection of the papacy and the church.
Online at Epistolae (See also Bibliographia record).