Honorius III, Pope. [Letter to Ingeborg of Denmark, queen of France, 1226] in Recueil des historiens des Gaules et de la France 19: 770-1

[Letter from Pope Honorius III to Ingeborg of Denmark, queen of France]
The pope confirms the queen’s gift to endow thirteen priests in a church and priory she had built, Saint-Jean en l’Ile at Corbeil, to say offices in perpetuity for the king’s soul and hers and their ancestors and successors. Ingeborg spent her last years, from 1225-1236, in a retreat attached to the priory.
Online at Epistolae (See also Bibliographia record).