Corpus Juris Civilis
In the Middle Ages and Italian Renaissance, the schools of "glossatores", "commentatores", and "usus modernus" distinguished themselves by their approach to the interpretation of "laws" (mainly Justinian's Corpus Juris Civilis). The University of Bologna gave birth to a "legal Renaissance" in the 11th century, when the Corpus Juris Civilis was rediscovered and systematically studied by men such as Irnerius and Johannes Gratian. It was an interpretative Renaissance. Subsequently, these were fully developed by Thomas Aquinas and Alberico Gentili.