Mary Madeline "May" Bonfils Stanton (April 30, 1883 – March 11, 1962) was an American heiress and philanthropist. She and her younger sister, Helen Bonfils, succeeded their father, Frederick Gilmer Bonfils, as principal owners of The Denver Post. However, May's elopement at age 21 with a non-Catholic salesman had forged a rift in her relationship with her parents and sister that worsened when Helen inherited the majority of their parents' estates. Following a three-year legal battle over the inheritance, the sisters cut off all communication with each other. May married twice but did not have children. Living a reclusive life, she invested her fortune into building and furnishing her 750-acre (300 ha) estate in Lakewood, Colorado – which included a mansion that was an exact replica of Mari