Sebastian Castello (name variations: Castalio, Chatelion; 1515 - December 29, 1563) was the rector of the College of Geneva (obviously not Geneva College, maybe what is today Université de Genève?). He was born in St. Martine du Fresne (in Switzerland?). His ideas conflicted with those of John Calvin who had Castello dismissed from his position in 1544. He moved to Basel, Switzerland where he became a professor of Greek. He wrote about tolerance, that the government has no right to insist on the specific form of faith and to expel other people not sharing it. This was outstanding at that time and in many parts of the world it still is.