A priory is a monastery of men or women under religious vows that is headed by a prior or prioress. Priories may be houses of mendicant friars or religious sisters (as the Dominicans, Augustinians, Franciscans, and Carmelites, for instance), or monasteries of monks or nuns (as the Benedictines). Houses of canons regular and canonesses regular also use this term, the alternative being "canonry".