Jura regalia
Jura regalia were the legal rights in medieval Europe that belonged exclusively to the king, either as essential to his sovereignty (jura majora, jura essentialia), such as royal authority, or as accidental (jura minora, jura accidentalia), such as hunting, fishing and mining rights. Many sovereigns in the Middle Ages and in later times claimed the right to seize the revenues of vacant episcopal sees or abbeys as a regalian right.