Pa. exhibit features wonders of World's Fairs - Article Photos 1/7

In this photo made on Friday, Oct. 5, 2012 at the Carnegie Museum of Art, media relations manager Jonathan Gaugler shines a small flashlight through the Maison Cartier mystery clock called "Le Ciel" that was on exhibit in the 1925 Paris Fair . This is part of the "Inventing the Modern World" exhibit is scheduled to open at Pittsburgh's Carnegie Museum of Art on Oct. 13, 2012, and run through Feb. 24, 2013. The show features works of furniture, metalwork, glass, ceramics, textiles, and jewelry produced by international artists and businesses made for world’s fairs, from London’s Great Exhibition of the Works of Industry of All Nations in 1851, to the New York World’s Fair in 1939. (AP Photo/Keith Srakocic)