Subject: Canon Law
Author of work: Gregorius IX
Title: Decretales
Subject: Theology
Author of work: Gregorius I
Title: Moralia
Subject: Canon Law
Author of work: Guido de Baysio
Title: Comment. in Sextum librum Decretalium
Subject: Canon Law
Author of work: Gratianus
Title: Decretum
Subject: Canon Law
Author of work: Gregorius IX
Title: Decretales
Subject: Theology
Author of work: Gregorius I
Title: Moralia
Subject: Grammar
Title: Grammatical treatise
Subject: Theology
Author of work: Gregorius I
Title: Dialogi
Subject: Theology
Author of work: Gregorius I
Title: Moralia
Subject: Theology
Author of work: Gregorius I
Title: De cura pastorali