1215:

King John signs the Magna Carta

Succumbing to pressure from the barons, John signed the document at Runnymede and declared that copies should be distributed and publicly read throughout England. While its initial impact was limited, the Magna Carta served as a significant precedent for future democratic government in the centuries to come, including that of the U.S.

1330:

Edward, the Black Prince

1381:

Wat Tyler

At the culmination of the Peasants' Revolt, rebel leader Tyler provoked a confrontation and was killed by the Mayor of London.