Sir Keith Vivian Thomas CH FBA FRHistS FLSW (born 2 January 1933) is a Welsh historian of the early modern world based at Oxford University.
[3] He was a member of the Economic and Social Research Council 1985–90, and of the Reviewing Committee on Exports of Works of Art 1990–93, and, since 1992, of the Royal Commission on Historical Manuscripts.
From 1991 to 1998, he was a trustee of the National Gallery and since 1997 he has been chairman of the British Library Advisory Committee for Arts, Humanities, and Social Sciences.
[citation needed] He is married to Valerie, Lady Thomas, a graduate of Somerville College, and has two children.
He is an Honorary Fellow of Balliol (1984) and St John's (1986), and Corpus Christi Colleges, Oxford, and of Cardiff University (1995).