The Summa Theologica is a compendium of theology written by Thomas Aquinas between 1265 and 1273. In Roman Catholicism it is the sum of all known learning and doctrine, of all that can be known about God and humanity’s relations with God — a landmark in the history of theology that famously offers five proofs of God’s existence, the first three of which are cosmological arguments; the fourth, a moral argument; and the fifth, a teleological argument.