Subject: Theology
Author of work: Gregorius I
Title: Index to works of Gregory
Subject: Liturgy
Title: Martyrologium
Subject: Theology
Title: Theological questions
Subject: Grammar
Author of work: Maffeus Vegius
Title: De verborum significatione
Subject: History
Author of work: Ranulphus Higden
Title: Polychronicon
Subject: Epistolae
Author of work: Gregorius I
Title: Registrum
Subject: Logic
Title: Logic
Subject: Civil Law
Author of work: Justinianus
Title: Digestum vetus
Subject: Canon Law
Author of work: Gregorius IX
Title: Decretales
Subject: Theology
Title: Table to a theological work