Subject: Biblica
Title: Commentary on the Gospels
Subject: Grammatical verse
Title: Grammatical verse
Subject: Canon Law
Author of work: Gregorius IX
Title: Decretales
Subject: Canon Law
Author of work: Gregorius IX
Title: Decretales
Subject: Canon Law
Author of work: Gregorius IX
Title: Decretales
Subject: Canon Law
Author of work: Gratianus
Title: Decretum Gratiani
Subject: Canon Law
Author of work: Gregorius IX
Title: Decretales
Subject: Theology
Author of work: Gregorius I
Title: Moralia