The Ninth Street Show, otherwise known as the 9th Street Art Exhibition, a gathering of a number of notable artists, marks the stepping-out of the post war New York avant-garde, collectively known as the New York School.
The Russian Empire commits the Circassian Genocide. More than 1.5 Million Circassians are murdered and surviving Circassians were driven from their homeland to the Ottoman Empire, ending the Russian-Circassian War.
Treaty of Troyes: With the Burgundian faction dominant in France, King Charles VI of France acknowledges Henry V of England as his heir and as virtual ruler of most of France.
Friday, May 14, 1260 (Julianian calendar)
Kublai sends his envoy Hao Jing to negotiate with Song Dynasty Chancellor Jia Sidao, after the small force left by Kublai south of the Yangzi River is destroyed by a Chinese army of the Southern Song Dynasty. Chancellor Jia Sidao imprisons the entire embassy of Kublai. This slight will not be forgotten by Kublai, but he is unable to assault the Song due to the civil war with his rival brother Ariq Böke.