11.   The opera house, designed by a French architect, Jean-Marie Charpentier, has a curved roof that opens toward the sky like a giant offering plate.

12.   With its winglike curved roofs and its shimmering surface of gold leaf, it was reflected in a pond to redouble its unearthly radiance.

13.   The traditional curved roofs found in Korean architecture combine to form a majestic covering for the stadium.