Lu-Tze is a character in the Discworld novels by Terry Pratchett. His name is based on the Taoist philosopher Lao Tse. He first appeared in the novel Small Gods as a minor character. He was one of the History Monks, a member of a Buddhism-like sect, that maintained Discworld history, based on the huge History Books in their Ramtop monastery. He spent much of the novel in the background, disguised as a simple sweeper. He also deliberately changed the course of history because he didn't like the way things "should" go, replacing a horrific war with a century of peace.