Institutes of the Christian Religion
In the West, [[Peter Lombard|Peter Lombard's]] 12th-century "[[Sentences]]", wherein he thematically collected a great series of quotations of the [[Church Fathers]], became the basis of a [[Middle Ages|medieval]] [[Scholasticism|scholastic]] tradition of thematic commentary and explanation. [[Thomas Aquinas|Thomas Aquinas's]] "[[Summa Theologiae]]" best exemplifies this scholastic tradition. The [[Lutheran scholasticism|Lutheran scholastic]] tradition of a thematic, ordered exposition of Christian theology emerged in the 16th century with [[Philipp Melanchthon|Philipp Melanchthon's]] "[[Loci Communes]]", and was countered by a Calvinist scholasticism, which is exemplified by [[John Calvin|John Calvin's]] "[[Institutes of the Christian Religion]]".