1260s in England
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Events from the 1260s in England.
Monarch – Henry III
- Early – following disputes, northern academics from the University of Cambridge attempt to set up a university at Northampton, suppressed by the Crown in 1265.
- 12 June – King Henry III of England obtains a papal bull releasing him from the Provisions of Oxford, setting the stage for a civil war over the power struggle between the crown and the aristocracy.
- July – Henry regains control of the government.
- January – Provisions of Westminster re-issued.
- April – Simon de Montfort, 6th Earl of Leicester, seizes control of southern England after Henry refuses to accept the Provisions of Oxford.
- 16 July – rebels occupy London.
- 2 October – Henry travels to Boulogne for an attempt to broker peace by King Louis IX of France; barons refuse to accept terms.
- Presumed date – Balliol College established in the University of Oxford by John I de Balliol on its modern-day site.
- 23 January – King Louis IX of France issues the Mise of Amiens, a settlement between King Henry III of England and barons led by Simon de Montfort heavily favouring the former, which leads to the Second Barons' War.
- February – Second Barons' War begins as Henry returns to fight Simon de Montfort's rebels.
- April – Gilbert de Clare, 6th Earl of Hertford leads a massacre of the Jews at Canterbury.
- 12 May to 14 May – Second Barons' War: the Battle of Lewes is fought between Simon de Montfort and King Henry III in Sussex. By the end of the battle, Montfort's forces capture both King Henry and his son, Prince Edward, and Henry is forced to sign the Mise of Lewes making Montfort the "uncrowned king of England".
- June – Simon de Montfort summons a parliament in London, the first to include Knights of the Shire.
- 12 August – Peace of Canterbury: papal legate and King Louis IX of France condemn the rebels, who are later excommunicated.
- 14 September – Walter de Merton formally completes the foundation of the House of Scholars of Merton (later Merton College, Oxford) to provide education in Malden and the University of Oxford.
- In the Peerage of England, the title Baron de Ros, the oldest continuously held peerage title in England, is created by writ of summons.
- 20 January – Montfort's Parliament, the first to include burgesses, and to insist that members be elected, assembles at Westminster.
- 28 May – Second Barons' War: Prince Edward escapes from captivity and rejoins royalist forces.
- 22 June – Simon de Montfort signs a treaty with Llewelyn the Last, recognising his rule over Wales.
- 4 August – Second Barons' War: The Battle of Evesham is fought in Worcestershire, with the army of Edward defeating the forces of rebellious barons led by Simon de Montfort and killing Montfort and many of his allies.
- 16 September – Second Barons' War: Henry disinherits all rebels against his rule.
- June – Second Barons' War: Henry III besieges the rebels in Kenilworth Castle.
- July – Second Barons' War: Liverpool Castle surrendered to Henry III's son, Edmund Crouchback, 1st Earl of Lancaster.
- 31 October – Second Barons' War: The war winds down as supporters of the slain rebel leader Simon de Montfort make an offer of peace to the king in the Dictum of Kenilworth.
- 14 December – Kenilworth surrenders.
- 9 April – Second Barons' War: Gilbert de Clare, 6th Earl of Hertford occupies London.
- June – Second Barons' War: Prince Edward captures the Isle of Ely, and the remaining rebels surrender.
- Summer – Second Barons' War: rebels and King Henry III agree to peace terms as laid out in the Dictum of Kenilworth.
- 29 September – Treaty of Montgomery: King Henry III acknowledges Llywelyn the Last's title of Prince of Wales.
- 19 November – the Statute of Marlborough is passed, confirming the Magna Carta and the Provisions of Westminster. It is the oldest English law still (partially) in force.
- Roger Bacon completes his work Opus Majus and sends it to Pope Clement IV, who had requested it be written; the work contains wide-ranging discussion of mathematics, optics, alchemy, astronomy, astrology and other topics, and includes what some believe to be the first description of a magnifying glass. Bacon also completes Opus Minus, a summary of Opus Majus, later in the same year.
- Howden Minster in Yorkshire becomes a collegiate church.
- Hamo de Crevequer, Lord Warden of the Cinque Ports (year of birth unknown)
- 20 January – John Maunsell, Lord Chancellor (born 1190s)
- 25 April – Roger de Quincy, 2nd Earl of Winchester, politician (born 1195)
- 4 August – killed in the Battle of Evesham:
- Henry de Bracton, jurist (year of birth unknown)
- Palmer, Alan & Veronica (1992). The Chronology of British History. London: Century Ltd. pp. 86–88. ISBN 0-7126-5616-2.
- Lawrence, C. H. (1984). "The University in State and Church". In Aston, T. H.; Catto, J. I. The History of the University of Oxford. 1. Oxford University Press.
- Williams, Hywel (2005). Cassell's Chronology of World History. Weidenfeld & Nicolson. pp. 144–146. ISBN 0-304-35730-8.
- "Balliol College: History". Archived from the original on 2007-10-09. Retrieved 2007-12-04.
- Text of the Statute of Marlborough 1267, cc 1, 4, 15 (the Distress Act) as in force today (including any amendments) within the United Kingdom, from legislation.gov.uk retrieved 4 December 2007.