What is a building dedicated to a single country at a world's fair, like those of 1939 or 1967, called?

A brutal 1959 mass murder in Kansas was the basis of which Truman Capote "nonfiction novel"? What word names both a bud on a potato and the opening in a needle? A bison roams on which state's flag? A Bugatti appeared on a 1999 stamp honoring the 70th anniversary of which principality's Grand Prix race? Which word names a place of religious veneration and the Los Angeles auditorium that hosted the 1997 Academy Awards? What do you call a building that houses a large telescope? What do you call a building used for curing meat with smoke? What word names a built-in bed, as on a ship or a train?