1220 On this day in history birth of emperor Go-Saga of Japan (d. 1272)
1283 Ludwig IV of Baveria, Roman Catholic Bavarian emperor (1314-47) was born on this day in history.
1543 On April - 01 birth of françois de Bonne, duc de Lesdiguières, Constable of France (d. 1626)
1578 On this day in history birth of william Harvey, England, physician (discovered blood circulation)
1582 On this day in history birth of gaspar de Crayer, Flemish painter
1582 On this day in history birth of thomas Simpson, composer
1610 Charles de Saint-Évremond, French soldier (d. 1703) was born on April - 01.
1640 On this day in history birth of georg Mohr, Danish mathematician (d. 1697)
1085 On April - 01 death of emperor Shenzong of China (b. 1048)
1132 Death of St-Hugues, Bishop of Grenoble (b. 1053) on April - 01.
1204 Eleanor of Aquitaine, wife of Louis VII & Henry II, dies at 81 on this day in history.
1205 Amalrik II, King of Cyprus/Jerusalem, dies on this day in history.
1528 On this day in history death of francisco de Peñalosa, Spanish composer
1548 On April - 01 sigismund I, the Elder, King of Poland, dies at 81
1580 Death of Alonso Mudarra, Spanish composer on this day in history.
1611 Death of Gillis van Valkenborch, Flemish painter, buried at about 72 on April - 01.