Longtime Fort Worth philanthropist Anne Marion has died.

The dedicated arts patron may be best known in North Texas for backing the construction and design of a new building in 2002 for the Modern Art Museum of Fort Worth.

She also founded the Georgia O’Keefe Museum in Santa Fe, New Mexico.

Marion died Tuesday in California. She was 81.

Fort Worth Mayor Betsy Price said the city “has lost a true champion of the arts and community.” Price also said Marion had an incredible passion for her community, a love for western heritage, and that “her passion will live on.”

Marion was the great-granddaughter of rancher Samuel Burk Burnett and the daughter of Anne Burnett Tandy. The family oil and ranching wealth helped fund the Burnett foundation, which has given millions of dollars toward the arts.

In 1997, Marion and her husband founded the O’Keefe Museum. Marion chaired its board until 2016. In a statement to the Associated Press, O’Keefe Museum curator Cody Hartley called Marion a “passionate arts patron, determined leader, and generous philanthropist.”