What is associated with: a building dedicated to one country at a worlds fair like the 1939 or 1967 one?

Based on the clue 'a buffalo roams on this states flag', what is the answer? What is associated with: a bugatti was on the 1999 stamp honoring the 70th anniversary of this principalitys grand prix… Based on the clue 'a buick was named for this new york city street th...', what is the answer? Based on the clue 'a builder probably wouldnt use this hat seen here ...', what is the answer? Based on the clue 'a building for locomotive repair or a big wide box...', what is the answer? What is associated with: a building for religious veneration or the la auditorium that hosted 1997s academy awards? Based on the clue 'a building here at sony pictures studios is named ...', what is the answer? Based on the clue 'a building or tent where the kids sleep or the bed...', what is the answer?