1278 On April - 17 birth of michael IX Palaeologus, co-ruling Eastern Roman Emperor (d. 1320)
1539 On this day in history birth of tobias Stimmer, Swiss painter/cartoonist (Comedia)
1573 Maximilian I, duke/ruler of Bayern (Catholic League) was born on April - 17.
1573 Maximilian I, Elector of Bavaria (d. 1651) was born on April - 17.
1586 On April - 17 birth of john Ford, English dramatist ('Tis Pity She's a Whore)
1587 On April - 17 birth of marco Ivan Lukacic, composer
1598 On this day in history birth of giovanni Riccioli, Italian astronomer (d. 1671)
1620 On April - 17 birth of marguerite Bourgeoys, founder of the Congregation of Notre Dame (d. 1700)
0326 Death of Alexander of Alexandria, Patriarch of Alexandria on April - 17.
0485 Proclus, Greek mathematician, dies in Athens [or Apr 14] on this day in history.
0617 Death of Donnán of Eigg, Celtic Christian martyr, patron saint of Eigg on this day in history.
0818 Bernhard I, King of Italy, dies on April - 17.
0858 Benedict III, Italian Pope (855-58), dies on April - 17.
1080 Death of King Harald III of Denmark (b. 1041) on this day in history.
1272 On this day in history zita/Cita, Italian maid/saint, dies at about 59
1297 Willem van Afflighem, Flemish poet/abbot St Truiden, dies at about 86 on April - 17.