1452 On April - 15 birth of leonardo da Vinci, Italy, painter/sculptor/scientist/visionary
1469 On April - 15 birth of nanak, 1st guru of Sikhs
1489 Sinan, Ottoman architect (d. 1588) was born on this day in history.
1552 On this day in history birth of pietro Cataldi, Italian mathematician (d. 1626)
1588 On this day in history birth of claudius Salmasius, [Claude Saumaise], French linguist
1637 Valentin Molitor, composer was born on this day in history.
1641 Robert Sibbald, Scottish physician (d. 1722) was born on this day in history.
1646 King Christian V of Denmark (d. 1699) was born on April - 15.
1053 On this day in history death of godwin, Earl of Wessex
1220 Adolf I, archbishop of Cologne, dies on April - 15.
1415 Death of Manuel Chrysoloras, Greek humanist and grammarian on this day in history.
1472 Leon B Alberti, Italian humanist/architect (Philodoxis), dies at 68 on April - 15.
1502 Jan IV Chalon, prince of Orange, dies on this day in history.
1605 On April - 15 boris Godunov, tsar of Russia (1598-1605), dies
1607 On this day in history cornelius Kilianus, Flemish translator/poet, dies at about 78
1610 Johan van Duivenoorde, mister of Warmond, dies at about 62 on April - 15.