[or Sébastian Castalio; Castellio]. French theologian, born at Dauphiné in 1515. About 1540 he was invited to Geneva by Calvin, and appointed humanity professor, but having the misfortune afterward to differ from the reformer in religious opinion, he was banished from the city, and went to Basel, where he spent the rest of his life in extreme poverty. Among his various writings may be mentioned De Hæreticis, etc., a treatise which argues against the right of the magistrate to punish heretical opinions; a Latin version of the Old and New Testaments; and a posthumous work, in dialogue, on predestination, election, free-will and faith. He died in Basel on the 29th of December 1563.
