Marie of Courtenay was born in the year twelve hundred and four into the ruling family of the Latin Empire of Constantinople, a state that emerged from the tumultuous events of the Fourth Crusade and the subsequent sack of Constantinople. This empire, while significant, was often viewed with skepticism due to its foreign origins and its Catholic faith, which contrasted sharply with the Orthodox Christianity and traditional Byzantine governance that had previously dominated the region.
As the daughter of Peter II of Courtenay and Yolanda of Flanders, Marie's life was intricately tied to the political machinations of her time. Her mother, Yolanda, played a pivotal role in arranging her marriage to Emperor Theodore I Laskaris of Nicaea, a union that would see Marie serve as Empress consort from the year twelve hundred and nineteen until her husband's death in twelve hundred and twenty-one.
Following the passing of Theodore, Marie's political acumen came to the forefront as she took on the role of regent for her younger brother, Baldwin II, the Latin Emperor, in the year twelve hundred and twenty-eight. During this time, she boldly styled herself as the 'Empress of Constantinople,' a title that reflected her aspirations and the complex legacy of her family's rule.