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Definition. The Magna Carta or 'Great Charter' was an agreement imposed on King John of England (r. 1199-1216) on 15 June 1215 by rebellious barons in order to limit his power and prevent arbitrary royal acts like land confiscation and unreasonable taxes.
English Kings (1199–1399)
English kings summoned Parliament most often because they needed its consent for taxes. The king collected revenue through customs duties, taxes on people's possessions (“movable property” taxes), and even taxes on every adult over 14.Explanation: