April 6, 1199 - Richard I (Richard the Lionheart) dies after being hit by an arrow at the Siege of Chalus in France. He is buried at Fontevrault Abbey. His mother, Eleanor of Aquitaine would later be buried there as well.
April 6,1590 - Queen Elizabeth's spymaster Sir Francis Walsingham died at about the age of 58. He probably saved her life a few times when he uncovered plots against her.