Edward Stafford, Duke of Buckingham. Was nephew to Elizabeth Woodville, the wife of King Edward IV therefore having the Plantagenet bloodline. He was found guilty of treason and beheaded. He plotted to kill Henry VIII.
Traitors' Gate, St Thomas's Tower at the Tower of London. Built for Edward I back in the century, it was where prisoners were brought via the Thames to the Tower to serve time or as likely, face the axe.
Kind Edward I Longshanks House of Plantagenet. great-grandfather of Queen Eliz II. Reigned for 34 years, 7 months, 14 days and was succeeded by son, Edward II. He named his son Prince of Wales, a titled given to every first-born son of the monarchy since.