1165 On this day in history birth of philip II Augustus, 1st great Capetian king of France (1179-1223)
1535 Shimazu Yoshihiro, Japanese samurai and warlord (d. 1619) was born on this day in history.
1567 On this day in history birth of francois de Sales, French bishop of Geneva/writer/saint
1597 Roger Twysden, English antiquarian and royalist (d. 1672) was born on August - 21.
1642 On this day in history birth of johann Friedrich Treiber, composer
1643 On August - 21 birth of afonso VI, king of Portugal (1656-67) (mentally ill)
1660 Hubert Gautier, engineer, wrote 1st book on bridge building was born on this day in history.
1665 On this day in history birth of giacomo F. Maraldi, French-Italian astronomer (d. 1729)
1131 On this day in history boudouin II van Bourg, king of Jerusalem, dies
1157 On this day in history death of king Alfonso VII of Castile (b. 1104/1105)
1190 Godfried III, duke of Brabant (Grimbergse war), dies on August - 21.
1245 On August - 21 alexander van Hales, English scholar, dies
1271 On this day in history death of alphonse of Toulouse, son of Louis VIII of France (b. 1220)
1516 On this day in history john III van Egmont, [Manke John], viceroy of Holland, dies at 78
1581 On this day in history death of sakuma Nobumori, Japanese retainer and samurai (b. 1527)
1614 Death of Elizabeth Báthory, the world's most prolific female serial killer (b. 1560) on August - 21.