Bertrade of Anjou

Bertrade de Montfort
Bertrade with Philip
Queen consort of the Franks
Tenure	1092–1108
Born	c. 1070
Died	14 February 1117 (aged 46–47)
Spouse	Fulk IV, Count of Anjou Philip I of France
Issue	Fulk of Jerusalem Philip, Count of Mantes Fleury, Seigneur of Nangis Cecile, Princess of Galilee
House	House of Montfort
Father	Simon I de Montfort
Mother	Agnes, Countess of Evreux
Religion	Roman Catholicism

Bertrade de Montfort (c. 1070 – 14 February 1117) was a queen consort of France by marriage to Philip I of France.

She was the daughter of Simon I de Montfort and Agnes, Countess of Evreux. Her brother was Amaury de Montfort.

According to the chronicler John of Marmoutier:

The lecherous Fulk then fell passionately in love with the sister of Amaury de Montfort, whom no good man ever praised save for her beauty.

Bertrade and Fulk were married, and they became the parents of a son, Fulk, but in 1092 Bertrade left her husband and took up with King Philip I of France. Philip married her on 15 May 1092, despite the fact that they both had spouses living. He was so enamoured of Bertrade that he refused to leave her even when threatened with excommunication. Pope Urban II did excommunicate him in 1095, and Philip was prevented from taking part in the First Crusade. Astonishingly, Bertrade persuaded Philip and Fulk to be friends.

According to Orderic Vitalis, Bertrade was anxious that one of her sons succeed Philip, and sent a letter to King Henry I of England asking him to arrest her stepson Louis. Orderic also claims she sought to kill Louis first through the arts of sorcery, and then through poison. Whatever the truth of these allegations, Louis succeeded Philip in 1108. Bertrade lived on until 1117; William of Malmesbury says: "Bertrade, still young and beautiful, took the veil at Fontevraud Abbey, always charming to men, pleasing to God, and like an angel." Her son from her first marriage was Fulk V of Anjou who later became King of Jerusalem iure uxoris. The dynasties founded by Fulk's sons ruled for centuries, one of them in England (Plantagenet), the other in Jerusalem.