The magnum opus of the medieval Christian philosopher and theologian Thomas Aquinas, the Summa theologiae (also known as Summa theologica, “Summary of Theology”) is a massive work that aims to expound all of Christian theology as systematically as possible. It is written in Latin, the universal language of medieval European scholarship and law. At its broadest level, the Summa depicts in philosophical terms the relationship between God and humanity and delineates how human reconciliation with God is made possible through Christ. Spanning three volumes treating God, humanity, and Christ the Redeemer, the Summa is arranged as 518 questions divided into 2,652 articles.