Subject: Canon Law
Title: treatise
Subject: Canon Law
Author of work: Gregorius IX
Title: Decretales
Subject: Theology
Author of work: Gregorius I
Title: Registrum
Subject: Canon Law
Author of work: Gregorius IX
Title: Decretales
Subject: Canon Law
Title: Treatise on canon law
Subject: Canon Law
Title: Treatise on canon law
Subject: Liturgy
Title: Breviarium
Subject: Canon Law
Author of work: Innocentius IV
Title: In Decretales
Subject: Liturgy
Title: Breviarium cum notis
Subject: Theology
Title: Flores Bernardi