Four days after John affixed his seal to Magna Carta, the barons renewed their oaths of allegiance at Runnymede, cementing an uneasy truce. The charter's promises of due process and limits on arbitrary taxation would be repudiated by the Pope within weeks, plunging England back into civil war, but the document survived as a foundational reference point for constitutional government centuries later.
The meadow at Runnymede, on the Thames between Windsor and Staines, was chosen as neutral ground—flat, open, defensible by neither side. King John, cornered by barons furious over crushing taxes and military failures in France, had sealed the great charter on June 15. On June 19, the barons renewed their homage to him, formally closing the immediate crisis.
The peace was a mirage. Pope Innocent III, viewing the charter as an affront to royal authority sanctioned by God, annulled it by August, and England spiraled into the First Barons' War. John died the following year with the kingdom in chaos.
Yet copies of the charter survived, reissued by John's successors in modified form. Clauses guaranteeing that no free man could be imprisoned without lawful judgment became touchstones for English common law, and centuries later, for the founders of the American republic. What began as a pragmatic truce between a hated king and his rebellious lords became, improbably, one of the most cited documents in the history of liberty.