Mathilde was Abbess of Essen Abbey from 973 to her death. She was one of the most important abbesses in the history of Essen. She was responsible for the abbey, for its buildings, its precious relics, liturgical vessels and manuscripts, its political contacts, and for commissioning translations and overseeing education. In the unreliable list of Essen Abbesses from 1672, she is listed as the second Abbess Mathilde and as a result, she is sometimes called "Mathilde II" to distinguish her from the earlier abbess of the same name, who is meant to have governed Essen Abbey from 907 to 910 but whose existence is disputed.

Essen Abbey was a community of secular canonesses for women of high nobility that formed the nucleus of modern-day Essen, Germany.