Pope Innocent III declared Philip Augustus' marriage to Agnes of Merania null and void, as he was still married to Ingeborg. He ordered the king to part from Agnes, and when he did not, the pope placed France under an interdict in 1199. This continued until 7 September 1200. Due to pressure from the pope, Ingeborg's brother King Valdemar II of Denmark and ultimately Agnes' death in 1201, Philip finally took Isambour back as his wife, but it would not be until 1213 that she would be recognized at court as queen.