Which royal-sounding January 6 holiday shares its name with a 1999 George Clooney film?

A round type of which farm structure, with the silo inside it, was popular in the early 1900s but is rare now? A rounded mass of radicchio or lettuce is called what? A row of purple seats rings which ballpark, marking a spot exactly 5,280 feet above sea level? A royal observatory was founded in which London borough in 1675? A royalist uprising in Paris was crushed by which young general in 1795? A rum smuggler is the central character in which author's 1937 novel "To Have and Have Not"? What is a run-down apartment house called? What word names a runner's rate or a popular brand of salsa?