Symbolism of The Tudor Rose: 22nd August 1485 – The Battle of Bosworth Field was won by the Lancastrians. Their leader Henry Tudor, Earl of Richmond, became the first English monarch of the Tudor dynasty by his victory and subsequent marriage to a Yorkist princess. His opponent Richard III, the last king of the House of York, was killed in the battle.
Richard III's wax seal. "…We have no difficulty in pronouncing Richard’s parliament the most meritorious national assembly for protecting the liberty of the subject and putting down abuses in the administration of justice that had sat in England since the reign of Henry III..." Lives of the Lord Chancellors of England