Queen of France, born Denmark, c.1176; died Corbeil, France, c.1237.
She was a Danish princess whom Philip Augustus of France married in 1193.
The very next day, however, he took a violent dislike to her, put her away, and even tried to send her back to Denmark.
As she refused to go, she was 'shut up' in a monastery and some courtier bishops declared her marriage invalid, under pretext of a distant relationship with Philip's first wife.
Ingeborg appealed to Rome and Pope Celestine III declared null and void the bishops' decision in the king's behalf; in spite of which he married a German princess, Agnes of Meran.
An interdict thrown over the kingdom and popular indignation forced him to take back Ingeborg, but she was ill-treated and even imprisoned.
Innocent III then intervened in her behalf, but it was only after a resistance of 20 years (1193-1213) and after Agnes's death that Philip gave back to Ingeborg the place that belonged to her as wife and queen.
New Catholic Dictionary