Saint Thomas was born at Roccasecca, Italy in 1225 of the family of the Counts of Aquino. He entered the Order at Naples at age 17, was a disciple of St. Albert the Great, and at age 25 earned the title of “doctor” from the University of Paris. The Summa Theologiae is his best-known work, and is one of the most influencial works of philosophy and the Church. It was published in 1485.
Here’s a short video about him from the University of Santo Tomas.