Overview
1264 (MCCLXIV) denotes both a calendar year in the 13th century and the integer 1264. As a year it falls in the high Middle Ages, a period of dynamic political struggle, military campaigns and growing urban and intellectual life across Eurasia. As a number it is an even composite with elementary mathematical characteristics.
Major events in the year
The most widely remembered event of 1264 in western history is the Battle of Lewes in England. In that engagement the forces led by Simon de Montfort defeated King Henry III, temporarily capturing the king and his heir. The clash was a central episode of the Second Barons' War, a conflict over royal authority and baronial rights that shaped later constitutional developments in England.
In Eurasia the mid-1260s saw the aftermath of succession struggles within the Mongol Empire. By 1264 Kublai Khan had advanced his claims to supremacy among the descendants of Genghis Khan and was consolidating authority in China and neighboring regions, even as other khanates retained autonomy. Across the Mediterranean and the Levant, the Crusader states continued to shrink, while Muslim polities and emerging powers such as the Mamluks exerted growing influence.
Notable developments and figures
Politically, the events of 1264 influenced long-term governance: the English baronial movement under leaders like Simon de Montfort pressed for limits on royal power and for broader representation, a trajectory that contributed to the early history of parliaments. In the wider Christian world the papacy and regional rulers negotiated authority, and cultural exchanges increased along trade and diplomatic routes opened by Mongol interactions.
Numerical properties of 1264
As an integer, 1264 equals 2^4 × 79, so its prime factors are 2 and 79 (with 79 prime). It is an even composite number. In Roman numerals it is written MCCLXIV. In binary notation it is 10011110000 and in hexadecimal it appears as 0x4F0. These representations are useful in basic number theory and computer applications.
Context and significance
Seen in context, 1264 sits amid a century of territorial realignments, evolving institutions and cultural production: Gothic architecture was spreading in Europe, universities and urban centers were expanding, and transcontinental contacts—diplomatic, commercial and military—were increasingly important. Events of this year are therefore best viewed as strands in longer processes that reshaped medieval political and cultural landscapes.
Selected facts
- Century: 13th (High Middle Ages).
- Roman numeral: MCCLXIV.
- Prime factorization: 2^4 × 79.
- Binary: 10011110000; Hex: 0x4F0.