Subject: Canon Law
Author of work: Gratianus
Title: Decretum Gratiani
Subject: Philosophy
Author of work: Aegidius Romanus
Title: De regimine principum
Subject: Philosophy
Author of work: Aegidius Romanus
Title: De regimine principum
Subject: Philosophy
Author of work: Aegidius Romanus
Title: De regimine principum
Subject: Grammar
Author of work: Johannes Balbus
Title: Catholicon