Medieval Sovereignty examines the idea of sovereignty in the Middle Ages and asks if it can be considered a fundamental element of medieval constitutional order. Francesco Maiolo analyzes the writings of Marsilius of Padua (1275/80–1342/43) and Bartolous of Saxoferrato (1314–57) and assesses their relative contributions as early proponents of popular sovereignty. Both are credited with having provided the legal justification for medieval popular government. Maiolo’s cogent reconsideration of this primacy is an important addition to current medieval studies.