Historical Events In May - 21
Thursday, 21 May 2026
0143 Earliest known date in Amer-pre Mayan king Harvest-Bergvorst installed 

0685 Battle at Nechtansmere Picten beat Northumbrians 

0685 Battle at Nechtansmere: Picten beat Northumbrians 

0878 Syracuse, Italy is captured by the Muslim sultan of Sicily. 

0879 Pope John VIII gives blessings to duke Branimir and to Croatian people, considered to be international recognition of Croatian state 

0996 Otto the Great's Saxon grandson, now 16, is crowned Otto III 2005at Rome 

0996 Pope Gregory V crowns his cousin Otto III German emperor 

0996 Otto the Great's Saxon grandson, now 16, is crowned Otto III May 21 at Rome 

1040 King Henry III gives Utrecht the Groninger currency 

1216 French crown prince Louis enters England 

1260 Kublai Khan of the Mongol Empire sends his envoy Hao Jing and two other advisors to the Song Dynasty court of Emperor Lizong of Song; while attempting to negotiate with the Song in order to resolve their conflict, Hao Jing and his fellow emissaries are imprisoned by order of the high Chancellor of China, Jia Sidao 

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