Theodoric Borgognoni (1205 – 1296/8), also known as Teodorico de' Borgognoni, and Theodoric of Lucca, was an Italian who became one of the most significant surgeons of the medieval period. A Dominican friar and Bishop of Cervia, Borgognoni is considered responsible for introducing and promoting important medical advances including basic antiseptic practice in surgery and the use of anaesthetics.