1259

For broader historical context, see 1250s and 13th century.

Years: 1256 1257 1258 – 1259 – 1260 1261 1262
Decades: 1220s 1230s 1240s – 1250s – 1260s 1270s 1280s
Centuries: 12th century – 13th century – 14th century 1259 state leaders

Events

Portion of a fresco of the Boyana Church, completed in 1259

September – The Empire of Nicaea defeats the Principality of Achaea at the Battle of Pelagonia, ensuring the eventual reconquest of Constantinople in 1261.
December 4 – Kings Louis IX of France and Henry III of England agree to the Treaty of Paris, in which Henry renounces his claims to French-controlled territory on continental Europe (including Normandy) in exchange for Louis withdrawing his support for English rebels.
The famous frescoes of the Boyana Church in Bulgaria are completed (the church and its murals are now a UNESCO World Heritage Site).
The German cities of Lübeck, Wismar, and Rostock enter into a pact to defend against pirates of the Baltic Sea, laying the groundwork for the Hanseatic League.

Lannathai, a kingdom in the north of Thailand, is founded by King Mengrai.
The Goryeo kingdom in Korea surrenders to invading Mongol forces.
The Chinese era Kaiqing begins and ends in the Northern Song Dynasty of China.
The Japanese Shoka era ends, and the Shogen era begins.