Princes in the Tower in the context of "Tower of London"

Richard III (2 October 1452 – 22 August 1485) was King of England from 26 June 1483 until his death in 1485. He was the last king of the Plantagenet dynasty and its cadet branch the House of York. His defeat and death at the Battle of Bosworth Field marked the end of the Middle Ages in England.

Richard was created Duke of Gloucester in 1461 after the accession to the throne of his older brother Edward IV. This was during the period known as the Wars of the Roses, an era when two branches of the royal family contested the throne; Edward and Richard were Yorkists, and their side of the family faced off against their Lancastrian cousins. In 1472, Richard married Anne Neville, daughter of Richard Neville, 16th Earl of Warwick, and widow of Edward of Lancaster, son of Henry VI, a Lancastrian. He governed northern England during Edward's reign, and played a role in the invasion of Scotland in 1482. When Edward IV died in April 1483, Richard was named Lord Protector of the realm for Edward's eldest son and successor, the 12-year-old Edward V. Before arrangements were complete for Edward V's coronation, scheduled for 22 June 1483, the marriage of his parents was declared bigamous and therefore invalid. Now officially illegitimate, Edward and his siblings were barred from inheriting the throne. On 25 June, an assembly of lords and commoners endorsed a declaration to this effect, and proclaimed Richard as the rightful king. He was crowned on 6 July 1483. Edward and his younger brother Richard of Shrewsbury, Duke of York, called the "Princes in the Tower", disappeared from the Tower of London around August 1483.

The Battle of Bosworth or Bosworth Field (/ˈbɒzwərθ/ BOZ-wərth) was the last significant battle of the Wars of the Roses, the civil war between the houses of Lancaster and York that extended across England and Wales in the latter half of the 15th century. Fought on 22 August 1485, the battle was won by an alliance of Lancastrians and disaffected Yorkists. Their leader Henry Tudor, Earl of Richmond, became the first Welsh monarch of England from the Tudor dynasty by his victory and subsequent marriage to the de facto Yorkist heiress, Elizabeth of York. His opponent Richard III, the last king of the House of York, was killed during the battle, the last English monarch to fall in battle. Historians consider Bosworth Field to mark the end of the Plantagenet dynasty, making it one of the defining moments of English history.

Richard's reign began in 1483 when he ascended the throne after his twelve-year-old nephew, Edward V, was declared illegitimate, likely at Richard’s instigation. The boy and his younger brother Richard soon disappeared, and their fate remains a mystery. Across the English Channel Henry Tudor, a descendant of the greatly diminished House of Lancaster, seized on Richard's difficulties and laid claim to the throne. Henry's first attempt to invade England in 1483 foundered in a storm, but his second arrived unopposed on 7 August 1485 on the south-west coast of Wales. Marching inland, Henry gathered support as he made for London. Richard hurriedly mustered his troops and intercepted Henry's army near Ambion Hill, south of the town of Market Bosworth in Leicestershire. Lord Stanley and Sir William Stanley also brought a force to the battlefield, but held back while they decided which side it would be most advantageous to support, initially lending only four knights to Henry's cause; these were: Sir Robert Tunstall, Sir John Savage (nephew of Lord Stanley), Sir Hugh Persall and Sir Humphrey Stanley. Sir John Savage was placed in command of the left flank of Henry's army.

Edward V (2 November 1470 – presumably July 1483) was King of England from 9 April to 25 June 1483. He succeeded his father, Edward IV, upon the latter's death. Edward V was never crowned, and his brief reign was dominated by the influence of his uncle and Lord Protector, the Duke of Gloucester, who deposed him to reign as King Richard III; this was confirmed by the Titulus Regius, an Act of Parliament which denounced any further claims through Edward IV's heirs by delegitimising Edward V and all of his siblings. This was later repealed by Henry VII, who subsequently married Elizabeth of York, Edward V's eldest sister.

Edward V and his younger brother, Richard of Shrewsbury, are known as the Princes in the Tower. They disappeared after being sent to heavily guarded royal lodgings in the Tower of London. Responsibility for their disappearance (and presumed deaths) is widely attributed to Richard III, who sent them to the Tower, but the lack of conclusive evidence and conflicting contemporary accounts allow for other possibilities.

Richard of Shrewsbury, Duke of York (17 August 1473 – disappeared July 1483) was the second son of King Edward IV of England and Elizabeth Woodville. Richard and his older brother, who briefly reigned as King Edward V of England, mysteriously disappeared shortly after their uncle Richard III became king in 1483.

Elizabeth of York (11 February 1466 – 11 February 1503) was Queen of England from her marriage to King Henry VII on 18 January 1486 until her death in 1503. She was the daughter of King Edward IV and Elizabeth Woodville, and her marriage to Henry VII followed his victory at the Battle of Bosworth Field, which marked the end of the civil war known as the Wars of the Roses.

Elizabeth's younger brothers, the "Princes in the Tower", mysteriously disappeared from the Tower of London shortly after their uncle Richard III seized the throne in 1483. Although the 1484 Act of Parliament Titulus Regius declared the marriage of her parents as invalid, Elizabeth and her sisters returned to court under Richard III, after spending ten months in sanctuary in Westminster Abbey. It was rumoured that Richard was plotting to marry Elizabeth. The final victory of the Lancastrian faction in the Wars of the Roses may have seemed a further disaster for the Yorkist princess. However, Henry Tudor knew the importance of Yorkist support for his invasion and promised to marry Elizabeth before he arrived in England. This may well have contributed to the haemorrhaging of Yorkist support for Richard, and her future husband had Titulus Regius repealed when he took the throne.