Richard Nelson Williamson (born 8 March 1940) is an English traditionalist bishop formerly in communion with the Catholic Church who opposes the changes in the Church brought about by the Second Vatican Council. He was originally a member of the Society of Saint Pius X (SSPX). He was subsequently excommunicated; this was lifted in 2009, but Williamson was convicted in German courts of denying the Holocaust and incitement related to those views, and the excommunication was reimposed by the Pope. Due to other actions, Williamson was expelled from SSPX in 2012 and once again excommunicated in 2015.