This Day in History
Today: September 17, 2026
1111
Highest Galician nobility led by Pedro Fróilaz de Traba and the bishop Diego Gelmírez crown Alfonso VII as "King of Galicia".[1]
1176
The Battle of Myriokephalon is the last attempt by the Byzantine Empire to recover central Anatolia from the Seljuk Turks.
1382
Louis the Great's daughter, Mary, is crowned "king" of Hungary.[2]
1462
Thirteen Years' War: A Polish army under Piotr Dunin decisively defeats the Teutonic Order at the Battle of Świecino.[3]
1543
The first Finnish-language book, the Abckiria by Mikael Agricola, is published in Stockholm.[4]
1577
The Treaty of Bergerac is signed between King Henry III of France and the Huguenots.[5]
1620
Polish–Ottoman War: The Ottoman Empire defeats the Polish–Lithuanian Commonwealth during the Battle of Cecora.
1631
Sweden wins a major victory at the Battle of Breitenfeld against the Holy Roman Empire during the Thirty Years' War.
1658
The Battle of Vilanova is fought between Portugal and Spain during the Portuguese Restoration War.
1683
Antonie van Leeuwenhoek writes a letter to the Royal Society describing "animalcules", later known as protozoa.[6]
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