Subject: Canon Law
Author of work: Gratianus
Title: Decretum Gratiani
Subject: Civil Law
Author of work: Justinianus
Title: Institutiones Justiniani
Subject: Canon Law
Author of work: Gratianus
Title: Decretum Gratiani
Subject: Liturgy
Title: Lectionarium
Subject: Civil Law
Title: Commentary on civil law
Subject: Philosophy
Author of work: Aristoteles
Title: Analytica posteriora
Subject: Theology
Author of work: Gregorius I
Title: Moralia
Subject: Civil Law
Title: Commentary on civil law
Subject: Medicine
Title: Medicine
Subject: Canon Law
Title: Commentary on Decretals