Thomas aquinas wrote summa theologica as a

As a compendium of medieval theology and philosophy.

Explanation:

The Summa Theologica was written by Saint Thomas Aquinas during the 13th century. In it, Aquinas develops his philosophical and theological arguments that, ever since, cemented the Catholic rational belief in God, the Church´s sacraments, and its dogma. This is one of the most important and influential works on philosophy ever written and, amongst other factors, earned its author the very select title of Doctor of the Church.

i do not the question is put in the corrorect order