Innocent III, Pope. [Letter to Ingeborg of Denmark, queen of France, 1200] in Patrologiae cursus completus. Series Latina (Patrologia Latina) 214: 881-83

[Letter from Pope Innocent III to Ingeborg of Denmark, queen of France]
The pope outlines the steps he has taken to repair Ingeborg's marriage and urges her to continue her efforts.
Online at Epistolae (See also Bibliographia record).