Which 1455–1485 conflict was fought between two rival branches of England's royal family?

Which show tune, sung by Louis Armstrong, ended the Beatles' 14-week run at No. 1 in 1964? At the 1997 U.S. Figure Skating Championships, 14-year-old Tara Lipinski upset which reigning world champion? The 1415 Battle of Agincourt was part of which war? In 1453, Mehmed II began his siege of which city, which fell about eight weeks later? The 1461 Battle of Towton in Yorkshire, perhaps the bloodiest ever fought on English soil, was part of which conflict? The Petrie family lived at 148 Bonnie Meadow Road in New Rochelle, New York, on which classic sitcom? Which Florentine artist painted "The Birth of Venus" in the mid-1480s? Which Leonardo da Vinci drawing shows a nude man with outstretched limbs inside both a circle and a square?