The Dissolution of the Monasteries, sometimes referred to as the Suppression of the Monasteries, was the set of administrative and legal processes between 1536 and 1541 by which Henry VIII disbanded Catholic monasteries, priories, convents and friaries in England, Wales and Ireland, appropriated their income, disposed of their assets, and reassigned or dismissed their former members and functions. Although the policy was originally envisaged as increasing the regular income of the Crown, much former monastic property was sold off to fund Henry's military campaigns in the 1540s. He was given the authority to do this in England and Wales by the Act of Supremacy, passed by Parliament in 1534, which made him Supreme Head of the Church in England, thus separating England from Papal authority, and by the First Suppression Act (1536) and the Second Suppression Act (1539). Bernard argues:


At the time of their suppression, a small number of English and Welsh religious houses could trace their origins back to Anglo-Saxon or Celtic foundations before the Norman Conquest, but the overwhelming majority of the 625 monastic communities dissolved by Henry VIII owed their existence to the wave of monastic enthusiasm that had Christendom in the 11th and 12th centuries. Very few English houses had been founded later than the end of the 13th century; the most recent foundation of those suppressed being the Bridgettine nunnery of Syon Abbey founded in 1415. (Syon was also the only suppressed community to maintain an unbroken existence in exile, the nuns returning to England in 1861.) Typically, 11th and 12th century founders had endowed monastic houses with both 'temporal' income in the form of revenues from landed estates, and 'spiritual' income in the form of tithes appropriated from parish churches under the founder's patronage. In consequence of this, religious houses in the 16th century controlled appointment to about two-fifths of all parish benefices in England, disposed of about half of all ecclesiastical income, and owned around a quarter of the nation's landed wealth.