Bruce established the Avalon Foundation in 1940, which made grants to colleges and universities, medical schools and hospitals, youth programs and community services, churches, environmental projects, and an array of cultural and arts organizations. In 1947, the Avalon Foundation was instrumental in the establishment of the Hampton National Historic Site in Maryland. In 1957, when Fortune prepared its first list of the wealthiest Americans, it estimated that Ailsa Mellon Bruce, her brother, Paul, and her cousins, Sarah Mellon and Richard King Mellon, were all among the richest eight people in the United States, with fortunes of between 400 and 700 million dollars each. In 1968, Ailsa and Paul donated $20 million to build an annex to the National Gallery of Art in Washington, D.C. At her death in 1969, Ailsa Bruce bequeathed 153 paintings, primarily by 19th-century French artists, to the National Gallery of Art, as well as establishing a fund for future acquisitions. Among the many works acquired by the Gallery through the Ailsa Mellon Bruce Fund was the portrait of Ginevra de' Benci, the only painting by Leonardo da Vinci in the United States. In 1969, the assets of Paul Mellon’s Old Dominion Foundation were merged into his sister's Avalon Foundation, which was renamed the Andrew W. Mellon Foundation in honor of their father.
Personal life
She dated PrinceOtto Bismarck, the grandson of Otto von Bismarck, the "Iron Chancellor", and was close to marrying him, but decided to marry David Bruce, an American, instead. On May 23, 1926, she was married to David Kirkpatrick Este Bruce, a scion of a prominent Virginia family including his father William Cabell Bruce, a U.S. Senator from Maryland, and brother James Cabell Bruce, the U.S. Ambassador to Argentina. Their engagement, marriage and honeymoon were followed closely by the news media. In 1933, after seven years of marriage, Ailsa gave birth to her only child;
Audrey Sheila Bruce, who married Stephen Richard Currier, who went missing during a flight in the Caribbean in January 1967 and were never recovered. They were the founders of the Taconic Foundation, a charitable giving organization, which was instrumental in the formation of the Council for United Civil Rights Leadership.
She obtained a divorce from her husband in Palm Beach, Florida in April 1945 on the grounds of "desertion and mental cruelty", receiving sole custody of their 11 year old daughter. Following their divorce, her ex-husband would later become the United States Ambassador to the United Kingdom from 1961 to 1969, the same position her father held. After her divorce, Mrs. Bruce was in a long rumored relationship with G. Lauder Greenway of the Lauder Greenway Family. In addition to their personal links, Greenway was a longtime trustee of Bruce's Avalon Foundation. She died on August 25, 1969 at Roosevelt Hospital in New York City. She had homes at 960 Fifth Avenue, a beach house in Atlantic Beach, NY, and a 121 acre estate in Syosset, New York on Long Island. Her obituary in The New York Times called her the "Richest Woman in U.S."
Descendants
When Audrey and her husband, Stephen Currier, died in a presumed plane crash in 1967, leaving three young children – Andrea Currier, Lavinia Currier, and Michael Stephen Currier, she decided to bequeath her collection of 18th-century English furniture and ceramics to the Carnegie Institute of Pittsburgh, Pennsylvania.
