(b Roccasecca, c. 1225; d Fossanova, 7 March 1274; can 18 July 1323; fd formerly 7 March; since 1970, 28 Jan).
Italian saint and theologian. He studied at Monte Cassino and the University of Naples, and then in 1244 he joined the Dominicans. In 1256, after further study under Albert the Great (1200–80) in Paris and Cologne, he became a Master of Theology. For the rest of his life he worked in Paris and in Italy. His contemporaries and immediate successors regarded him as a very important theologian, but it was not until the 16th century that he came to be thought pre-eminent among Catholic systematic thinkers. He produced two major works, the Summa contra Gentiles and the Summa theologiae, and the latter was unfinished at his death. . . . His emblem in art is a star.