1165 On August - 21 birth of philip II Augustus, 1st great Capetian king of France (1179-1223)
1535 On this day in history birth of shimazu Yoshihiro, Japanese samurai and warlord (d. 1619)
1567 Francois de Sales, French bishop of Geneva/writer/saint was born on August - 21.
1597 Roger Twysden, English antiquarian and royalist (d. 1672) was born on this day in history.
1642 On this day in history 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 August - 21 birth of giacomo F. Maraldi, French-Italian astronomer (d. 1729)
1131 Boudouin II van Bourg, king of Jerusalem, dies on this day in history.
1157 Death of King Alfonso VII of Castile (b. 1104/1105) on this day in history.
1190 Godfried III, duke of Brabant (Grimbergse war), dies on this day in history.
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 On August - 21 john III van Egmont, [Manke John], viceroy of Holland, dies at 78
1581 Death of Sakuma Nobumori, Japanese retainer and samurai (b. 1527) on August - 21.
1614 Death of Elizabeth Báthory, the world's most prolific female serial killer (b. 1560) on August - 21.