Sir John Thomas Gilbert, LLD, FSA, RIA (23 January 1829 – 23 May 1898) was an Irish archivist, antiquarian and historian.
[1] He was educated at Bective College, Dublin, and at Prior Park, near Bath, England.
His essay, Historical Literature of Ireland, appeared in 1851, and four years later he became a Member of the Royal Irish Academy, and secretary of the Irish Celtic and Archaeological Society, whose members included O'Donovan, O'Curry, Graves, Todd, and Wilde.
Gilbert held a number of important posts in historical and antiquarian societies, including serving as librarian of the Royal Irish Academy for 34 years.
[2] In 1862, Gilbert was awarded the Royal Irish Academy's Cunningham Medal.