Thomas Aquinas

Thomas Aquinas OP was an Italian Dominican friar and priest, the foremost Scholastic thinker, as well one of the 10 most influential philosophers and theologians in the Western tradition. He was from the county of Aquino in the Kingdom of Sicily.
Thomas was a proponent of natural theology and the father of a school of thought known as Thomism. He argued that God is the source of the light of natural reason and the light of faith. He embraced several ideas put forward by Aristotle and attempted to synthesize Aristotelian philosophy with the principles of Christianity. He has been described as "the most influential thinker of the medieval period" and "the greatest of the medieval philosopher-theologians".
Thomas's best-known works are the unfinished Summa Theologica, or Summa Theologiae, the Disputed Questions on Truth and the Summa contra Gentiles. His commentaries on Christian Scripture and on Aristotle also form an important part of his body of work. He is also notable for his Eucharistic hymns, which form a part of the Church's liturgy.
As a Doctor of the Church, Thomas Aquinas is considered one of the Catholic Church's greatest theologians and philosophers.