Thomas Witney or Thomas of Witney (fl. 1292–1342) was an English master mason, probably born in Witney, Oxfordshire. The first record of his work is as a mason on the building of St Stephen's Chapel, London in the years following 1292.John Harvey, revised by T. Ayers, Witney, Thomas (fl. 1292–1342), Oxford Dictionary of National Biography, Oxford University Press, 2004; online edition (subscription required). Retrieved 2020-02-29.
He worked on Exeter Cathedral under Bishops Stapledon and Grandisson from about 1313 until his death,Audrey Erskine, Grandison, John (1292–1369), Oxford Dictionary of National Biography, Oxford University Press, 2004; online edition (subscription required). Retrieved 2020-02-29. and was probably also responsible for the octagonal Lady Chapel in Wells Cathedral.
References