Richard of Cornwall

Richard of Cornwall (1209–1272), second son of King John, was made Earl of Cornwall by his brother Henry III in 1225, and his Cornish revenues made him among Europe's richest men. He rebelled against Henry three times. In 1231 he married Isabel Marshal of a family often opposed to the king. He joined the Barons' Crusade in 1240, freeing prisoners and refortifying Ascalon.

In 1257 he bought election as King of the Romans for twenty-eight thousand marks and was crowned at Aachen. Captured in a windmill after Lewes in 1264, he was held until September 1265 and died at Berkhamsted on 2 April 1272.