1165 On August - 21 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 August - 21.
1567 On August - 21 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 August - 21 birth of johann Friedrich Treiber, composer
1643 On this day in history birth of afonso VI, king of Portugal (1656-67) (mentally ill)
1660 Hubert Gautier, engineer, wrote 1st book on bridge building was born on August - 21.
1665 On this day in history birth of giacomo F. Maraldi, French-Italian astronomer (d. 1729)
1131 Boudouin II van Bourg, king of Jerusalem, dies on August - 21.
1157 Death of King Alfonso VII of Castile (b. 1104/1105) on this day in history.
1190 On August - 21 godfried III, duke of Brabant (Grimbergse war), dies
1245 Alexander van Hales, English scholar, dies on August - 21.
1271 Death of Alphonse of Toulouse, son of Louis VIII of France (b. 1220) on August - 21.
1516 John III van Egmont, [Manke John], viceroy of Holland, dies at 78 on August - 21.
1581 Death of Sakuma Nobumori, Japanese retainer and samurai (b. 1527) on this day in history.
1614 Death of Elizabeth Báthory, the world's most prolific female serial killer (b. 1560) on August - 21.