Historical Events In August - 20
Saturday, 03 January 2026
0002 Venus-Jupiter in conjunction-Star of Bethlehem on August - 20. 

0535 Mochta of Louth, disciple of St. Patrick on this day in history. 

0573 On this day in history gregory of Tours selected bishop of Tours 

0636 On August - 20 battle at Yarmuk: Moslems beat Byzantines [or August 15] 

0917 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 on August - 20. 

0917 On this day in history battle at Anchialus: Bulgaria army counter attacks Byzantines 

0984 On August - 20 john XIV, [Petrus Canepanova], Italian Pope (983-84), dies 

1000 The foundation of the Hungarian state, Hungary is established as a Christian kingdom by Stephen I of Hungary on August - 20. 

1153 On August - 20 bernard[us] van Clairvaux, French saint, dies 

1191 On August - 20 crusader King Richard I kills 3,000 muslim prisoners in Akko 

1384 On this day in history geert Great, [Gerardus Magnus], theologist (Getijdenboek), dies 

1391 Konrad von Wallenrode becomes the 24th Hochmeister of the Teutonic Order on this day in history. 

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

1526 On this day in history peter Opmeer, church historian/humanist (Historia Martyrum) 

1534 On August - 20 turkish admiral Chaireddin"Barbarossa" occupies Tunis 

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

1561 Jacopo Peri, composer on August - 20. 

1566 On this day in history iconoclasm reaches Antwerp Belgium 

1583 Humphrey Gilbert c1537-1583 sails to Cape Race Newfoundland to fish for cod and explore mainland; sends two ships back to England on August - 20. 

1585 On this day in history english queen Elizabeth I signs Treaty of Nonsuch: aid to Netherland 

1597 1st Dutch East India Company ships returned from Far East on August - 20. 

1604 Spanish garrison of Sluis surrenders to count Maurice on this day in history. 

1619 1st Black slaves brought by Dutch to colony of Jamestown Virginia on August - 20. 

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

1625 Thomas Corneille, French playwright on this day in history. 

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

1637 On this day in history cornelis Van Aerssen, Dutch governor/co-owner of Surinam 

1639 Martin Opitz, German poet/historian (Troerinnen), dies at 41 on this day in history. 

1641 On August - 20 britain & Scotland sign Treaty of Pacification 

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

1648 Edward Herbert of Cherbury, English military/philosopher, dies at 65 on this day in history. 

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

1666 On August - 20 alphonse d' Eve, composer 

1672 Former Grand Pensionary Johan de Witt and his brother Cornelis are brutally murdered by an angry mob in The Hague on August - 20. 

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