Ingeborg of Denmark, Queen of France

Ingeborg of Denmark (; 1174 – 29 July 1237) was Queen of France by marriage to Philip II of France. She was a daughter of Valdemar I of Denmark and Sofia of Minsk.

Marriage Ingeborg was married to Philip II Augustus of France on 14 August 1193, after the death of Philip's first wife Isabelle of Hainaut (d. 1190). Her marriage brought a large dowry from her brother King Canute VI of Denmark. Stephen of Tournai described her as "very kind, young of age but old of wisdom." On the day after his marriage to Ingeborg, King Philip changed his mind, wished to obtain a separation and attempted to send her back to Denmark. Outraged, Ingeborg fled to a convent in Soissons, from where she protested to Pope Celestine III.

Three months after the wedding, Philip summoned an ecclesiastical council in Compiègne and had it draw a false family tree to show that he and Ingeborg would have been related through Philip's first wife. Contemporary Canon law stated that a man and a woman could not marry if they shared an ancestor within the last seven generations. The council therefore declared the marriage void.

Philip married Agnes of Merania in June 1196. In that same year, Ingeborg wrote to Pope Celestine III, declaring her grief of this event. This letter was one of a handful of Ingeborg's letters in Latin that spoke of unfair treatment regarding her marriage. Then, in 1198, the new pope, Pope Innocent III, declared that this new marriage was void because the previous marriage was still valid. He ordered Philip to dismiss Agnes and take Ingeborg back. Ingeborg had written to him, stating abuse and isolation and claiming thoughts of suicide because of harsh treatment.

Philip's response was to lock Ingeborg away in the Château d'Étampes in Essonne. Locked up in a tower, Ingeborg was a prisoner. Food was irregular and sometimes insufficient. No one was allowed to visit her, except for one occasion when two Danish chaplains were allowed to visit. Philip, meanwhile, brought Agnes back, and continued to live with her, producing a second child, a son. For these offences, Philip was excommunicated in 1200, and the kingdom was placed under an interdict.