Which Leonardo da Vinci drawing shows a nude man with outstretched limbs inside both a circle and a square?

Which 1455–1485 conflict was fought between two rival branches of England's royal family? 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? The 1494 Treaty of Tordesillas settled a dispute over new lands between Portugal and which nation? The 1494 Treaty of Tordesillas drew a line of demarcation between which two countries' overseas empires? The 1499 Peace of Basel helped lead to the independence of cantons that became which modern nation? Rossini's 1829 opera, famous for its galloping overture, is named for which legendary 14th-century Swiss hero?