Historical Events In August - 20
Saturday, 20 December 2025
0002 Venus-Jupiter in conjunction-Star of Bethlehem on this day in history. 

0535 On this day in history mochta of Louth, disciple of St. Patrick 

0573 On August - 20 gregory of Tours selected bishop of Tours 

0636 On this day in history battle at Yarmuk: Moslems beat Byzantines [or August 15] 

0917 On August - 20 the Bulgarian czar Symeon overruns Thrace in violation of a 913 agreement with Constantinople The Byzantines launch a counterattack but are routed August 20 at Anchialus Symeon gains control of the Balkans 

0917 Battle at Anchialus: Bulgaria army counter attacks Byzantines on August - 20. 

0984 John XIV, [Petrus Canepanova], Italian Pope (983-84), dies on August - 20. 

1000 The foundation of the Hungarian state, Hungary is established as a Christian kingdom by Stephen I of Hungary on this day in history. 

1153 Bernard[us] van Clairvaux, French saint, dies on August - 20. 

1191 Crusader King Richard I kills 3,000 muslim prisoners in Akko on this day in history. 

1384 Geert Great, [Gerardus Magnus], theologist (Getijdenboek), dies on August - 20. 

1391 On August - 20 konrad von Wallenrode becomes the 24th Hochmeister of the Teutonic Order. 

1517 On this day in history antoine Perrenot de Granvelle, cardinal/viceroy of Naples (1571-75) 

1526 Peter Opmeer, church historian/humanist (Historia Martyrum) on August - 20. 

1534 Turkish admiral Chaireddin"Barbarossa" occupies Tunis on this day in history. 

1538 On August - 20 aefgen Listinck, Dutch anabaptist, burned at stake 

1561 On this day in history jacopo Peri, composer 

1566 On August - 20 iconoclasm reaches Antwerp Belgium 

1583 On this day in history humphrey Gilbert c1537-1583 sails to Cape Race Newfoundland to fish for cod and explore mainland; sends two ships back to England. 

1585 English queen Elizabeth I signs Treaty of Nonsuch: aid to Netherland on this day in history. 

1597 1st Dutch East India Company ships returned from Far East on this day in history. 

1604 On this day in history spanish garrison of Sluis surrenders to count Maurice 

1619 1st Black slaves brought by Dutch to colony of Jamestown Virginia on this day in history. 

1620 Hudson's Bay Company employee Henry Kelsey sees buffalo on the Prairies, southwest of The Pas; the first white man to describe them on this day in history. 

1625 On August - 20 thomas Corneille, French playwright 

1632 Valentin de Boulogne, French painter, buried at 38 on August - 20. 

1637 Cornelis Van Aerssen, Dutch governor/co-owner of Surinam on August - 20. 

1639 Martin Opitz, German poet/historian (Troerinnen), dies at 41 on August - 20. 

1641 On this day in history britain & Scotland sign Treaty of Pacification 

1648 On August - 20 battle of Lens: French duke d'Enghien defeats Spaniards 

1648 On this day in history edward Herbert of Cherbury, English military/philosopher, dies at 65 

1665 On this day in history bernardus Smijtegelt, vicar (Gekrookte Reed) 

1666 Alphonse d' Eve, composer on this day in history. 

1672 On this day in history former Grand Pensionary Johan de Witt and his brother Cornelis are brutally murdered by an angry mob in The Hague. 

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