Mathilde of Boulogne was a noblewoman born around 1105 in Boulogne, France. She was the daughter of Eustace III, Count of Boulogne and Mary of Scotland. Mathilde became the wife of Stephen of Blois, who later became King of England. Their marriage was significant in the context of the Norman Conquest and the ensuing struggles for the English throne. Mathilde played a crucial role during the Anarchy, a civil war in England between her husband and Empress Matilda, the daughter of Henry I of England. She supported Stephen's claim to the throne and was known for her resilience and political acumen during this tumultuous period.