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Henry IV, the first Lancastrian king of England, was born in Bolingbroke Castle, Lincolnshire, on April 3, 1367. He was the son of John of Gaunt, Duke of Lancaster, and his first wife, Blanche of Lancaster. Henry IV's birth marked the beginning of a new era in English history, as he was the first king to come to the throne through a parliamentary deposition rather than through hereditary succession.