Diana Cecil, Countess of Oxford (1596–1654) was an English aristocrat.
She was a daughter of William Cecil, 2nd Earl of Exeter and his second wife Elizabeth Drury, a daughter of Sir William Drury and Elizabeth Stafford.
Her portrait was painted by William Larkin, by the artist known as the "Comet Master" or Paul van Somer, by Cornelius Johnson, and by Anthony van Dyck.
[1][2][3][4] In 1624 she married Henry de Vere, 18th Earl of Oxford.
Thomas Bruce built the Ailesbury Mausoleum in her memory in the churchyard of St. Mary's Church, Maulden, Bedfordshire.