House of York

The fourth surviving legitimate son of Edward III and Philippa of Hainault, Edmund of Langley, 1st Duke of York, was created earl of Cambridge in 1362 and the first duke of York in 1385. Edmund's first marriage was to Isabella of Castile, daughter of Peter of Castile and María de Padilla, and sister of Constance of Castile, second wife of Edmund's older brother John of Gaunt. Through this marriage Edmund had two sons, Edward, 2nd duke of York and the younger Richard of Conisburgh. His second marriage was to Joan Holland, whose sister Alianore Holland was mother to Anne Mortimer, the great-great-granddaughter of Edward III via Lionel of Antwerp, 1st Duke of Clarence, second surviving son of Edward III, and the elder brother of John of Gaunt. Richard of Conisburgh married Anne Mortimer, the marriage producing two children, Isabel of Cambridge and Richard of York, 3rd Duke of York. It was through Anne Mortimer's lineage that the Yorkists derived their main claim to the throne.

Following Edmund of Langley's death in 1402, his son Edward succeeded to the dukedom but had no issue before he was killed at the Battle of Agincourt in 1415.[2] His other son Richard had been executed for treason earlier in the same year following his involvement in the Southampton Plot to depose Henry V in favour of Edmund Mortimer, Richard's brother-in-law. The dukedom therefore passed to Richard's son, who became Richard of York, 3rd Duke of York. He also became heir general to the Earldom of March, after his mother's only brother, Edmund Mortimer, 5th Earl of March, died without issue in 1425. Anne and Edmund Mortimer's father Roger Mortimer, 4th Earl of March had been named heir presumptive of King Richard II before the seizure of the throne by Henry IV, the first Lancastrian king, in 1399. Although it had been passed over at the time, Richard also inherited this Mortimer claim to the throne as well as the Mortimer estates. Richard adopted a new coat of arms (in lieu of his paternal arms) which quartered the arms of Clarence, de Burgh and Mortimer, emphasising his claim to the throne from that senior lineage.

Despite his elevated status, Richard Plantagenet was denied a position in government by the advisers of the weak Henry VI, particularly John Beaufort, 1st Duke of Somerset, and the queen consort, Margaret of Anjou. Although he served as Protector of the Realm during Henry VI's period of incapacity in 1453–54, his reforms were reversed by Somerset's party once the king had recovered.

The Wars of the Roses began the following year, with the First Battle of St Albans. Initially, Richard aimed only to purge his Lancastrian political opponents from positions of influence over the king. It was not until October 1460 that he claimed the throne for the House of York. In that year the Yorkists had captured the king at the battle of Northampton, but victory was short-lived. Richard and his second son Edmund were killed at the battle of Wakefield on 30 December.

Richard's claim to the throne was inherited by his son Edward. With the support of Richard Neville, 16th Earl of Warwick ("The Kingmaker"), Edward, already showing great promise as a leader of men, defeated the Lancastrians in a succession of battles. While Henry VI and Margaret of Anjou were campaigning in the north, Warwick gained control of the capital and had Edward declared king in London in 1461. Edward strengthened his claim with a decisive victory at the Battle of Towton in the same year, in the course of which the Lancastrian army was virtually wiped out.

The early reign of Edward IV was marred by Lancastrian plotting and uprisings in favour of Henry VI. Warwick himself changed sides, and supported Margaret of Anjou and the king's jealous brother George, Duke of Clarence, in briefly restoring Henry in 1470–71. However, Edward regained his throne, and the House of Lancaster was wiped out with the death of Henry VI himself, in the Tower of London in 1471. In 1478, the continued trouble caused by Clarence led to his execution in the Tower of London; popularly he is thought to have been drowned in a butt of malmsey wine.

On Edward's death in 1483, the crown passed to his twelve-year-old son Edward. Edward IV's younger brother Richard, Duke of Gloucester, was appointed Protector, and the young king, and his brother Richard, were accommodated into the Tower of London. The famous Princes in the Tower's fate remains a mystery. As today it is unknown whether they were killed or who might have killed them. Parliament declared, in the document Titulus Regius, that the two boys were illegitimate, on the grounds that Edward IV's marriage was invalid, and as such Richard was heir to the throne. He was crowned Richard III in July 1483.

Though the House of Lancaster's claimants were now the Royal Houses of Portugal and Castile through the Duke of Lancaster's two legitimate daughters, who had married into those houses, Henry Tudor, a descendant of the Beauforts, a legitimized branch of the House of Lancaster put forward his claim. Furthermore, some Edwardian loyalists were undeniably opposed to Richard, dividing his Yorkist power base. A coup attempt failed in late 1483, but in 1485 Richard met Henry Tudor at the battle of Bosworth Field. During the battle, some of Richard's important supporters switched sides or withheld their retainers from the field. Richard himself was killed. He was the last of the Plantagenet kings, as well as the last English king to die in battle.

Henry Tudor declared himself king, took Elizabeth of York, eldest child of Edward IV, as his wife, claiming to have united the surviving houses of York and Lancaster, and acceded to the throne as Henry VII, founder of the Tudor dynasty which reigned until 1603.

• Quia Emptores
• Yorkshire
• Culture of Yorkshire
• Pretenders
• Alternative successions to the English and British Crown

• The White Rose of York on the 'History of York' website.
• The Plantagenets on the official website of the British monarchy.
• The Yorkists on the official website of the British monarchy.