This book explores the legal and theological thought of Master Vacarius
(c.1115/20 - c.1200), the renowned twelfth-century jurist. It focuses on
this Italian master's four works, composed in the second half of the
twelfth century, which deal with the resolution of conflict in law and
theology. Vacarius is a paradox for scholars. They have found it
difficult to reconcile his role as a legal teacher, notably through his
textbook the Liber pauperum ('Book of the Poor'), which established a
school of Roman law at Oxford, with his 'extra-legal' works on marriage,
Christology and heretical theology. This study accounts for this paradox
by exploring these three extra-legal treatises, composed in the 1160s
and 1170s, in light of Vacarius' legal textbook. The author argues that
Vacarius applies the legal method of the ius commune (European common
law) to theological and sacramental debates. In this way, Vacarius
represents a trend in medieval intellectual history, particular to the
twelfth-century renaissance, which has been little appreciated to date -
the hermeneutic of the 'lawyer-theologian'.