Mary Duke Biddle Trent Semans | |
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| Born | Mary Duke Biddle February 21, 1920 |
| Died | January 25, 2012 (aged 91) |
| Alma mater | Duke University (A.B. 1939) |
| Known for | Philanthropy |
| Spouse(s) | Josiah Charles Trent (1938–48) James Semans (1953–2005) |
| Children | Mary Trent Jones Sarah Trent Harris Rebecca Trent Kirkland Barbara Trent Kimbrell Jenny Semans Koortbojian James Duke Biddle Trent Semans Beth Semans Hubbard |
| Parent(s) | Anthony J. Drexel Biddle, Jr. Mary Duke Biddle |
| Relatives | Anthony Joseph Drexel Biddle, Sr. (grandfather) Benjamin Newton Duke (grandfather) Washington Duke (great-grandfather) |
Mary Duke Biddle Trent Semans (February 21, 1920 – January 25, 2012) was an American heiress, activist, politician, and philanthropist. She was the granddaughter of Benjamin N. Duke and the great-granddaughter of Washington Duke, both tobacco and energy tycoons who helped start Duke University. Semans is remembered for her support and work towards promoting the arts and humanities through various philanthropic entities.