[5][6] Some time during the Gilded Age, Twombly and her mother commissioned American architect Whitney Warren to design a playhouse for their estate.
"[7] In 1908, Twombly was a bridesmaid during a "notable international marriage event" of Gladys Vanderbilt and Count László Széchenyi of Hungary.
[8] The ceremony, led by St. Patrick's Cathedral Monsignor Michael J. Lavelle, took place at the Cornelius Vanderbilt II House at 1 West 57th Street, New York.
[11] On November 6, 1931, Twombly was the Chairman of the Peacock Ball,[2] a New York charity event with 3,000 prominent attendees.
"[23] In 1940, Twombly was involved, possibly as an investor, in the Redwood Library and Athenaeum in Newport, Rhode Island.
[24] On September 1, 1954, Twombly died of heart failure at the Hôtel Ritz in Paris, France, a city she "dearly loved.