mixtum imperium

• imperium mixtum

Literally “mixed” or “composite power”, “composite authority”. According to Ulpian, mixtum denotes a mixture of imperium and iūrisdictiō.

mixtum imperium n (genitive mixtī imperiī or mixtī imperī); second declension (law)

1. (Ancient Rome) The delegable authority of a judge to execute penalties, primarily in civil cases.
2. (Medieval Latin) The authority of lower magistrates, especially over private matters; a subsidiary form of authority dependent on the higher merum imperium.

In the Middle Ages, often found in the collocation merum et mixtum imperium to denote unconstrained independence or legislative sovereignty.

• merum imperium

• Mayer, Thomas F. (1995) “On the road to 1534: the occupation of Tournai and Henry VIII’s theory of sovereignty”, in Dale Hoak, editor, Tudor Political Culture, →ISBN, page 18
• Maiolo, Francesco (2007) Medieval Sovereignty: Marsilius of Padua and Bartolus of Saxoferrato, Eburon, →ISBN, pages 155–56
• Lee, Daniel (2016) Popular Sovereignty in Early Modern Constitutional Thought, Oxford University Press, →ISBN, pages 79–87