| Name | Treaty of Northampton |
| Year | 1218 |
| Parties | King John of England • Rebellious English barons |
| Purpose | To end the First Barons' War in England |
| Concessions | Reaffirmed the provisions of Magna Carta • Established Parliament as an integral part of English government |
| Significance | Set important precedents for the balance of power between the crown and nobility in 13th century England |
