A set of five arguments to prove
the existence of God, devised by
Thomas Aquinas.
The first three are similar to the
Cosmological argument. The fifth one is the
argument from design. The fourth says: "we see that some things are better than others (eg a sculpture can be said more beautiful than another), which leads to the necessity of a perfect standard to evaluate all other things; this perfec standard being, of course, God.
All 5 are helplessly flawed. See
Anselm of Aosta.