Staged to celebrate the completion of the Panama Canal, and drawing over 19 million visitors in only nine months, the Pan-Pacific International Expo rose like a literal jewel from the ashes of San Francisco's 1906 Earthquake and Fire.
A Century of Progress International Exposition was held in Chicago, Illinois from 1933 to 1934 to celebrate the city's centennial. The theme of the fair was technological innovation. Its motto was "Science Finds, Industry Applies, Man Conforms".
The 1939-40 New York World's Fair, located on the current site of Flushing Meadows-Corona Park, was one of the largest world's fairs of all time. The fair ran for two seasons and over 44 million people attended.
The Golden Gate International Exposition was held in San Francisco, California to celebrate the opening of the San Francisco-Oakland Bay Bridge and the Golden Gate Bridge. The exposition's first season ran from February 18, 1939 through October 29, 1939 and its second season was from May 25, 1940 through September 29, 1940.
The 1964/1965 New York World’s Fair, located on the current site of Flushing Meadows-Corona Park. The fair ran for two seasons and took place without sanctioning from the Bureau of International Expositions.
Expo 67 was held in Montreal, Quebec, Canada from April 27 to October 29, 1967. It was considered to be the most successful World's Fair of the 20th century, with over 50 million visitors and 62 nations participating.
If only there was a readable sign. But the more I think about the roof, the more I think it was hospitality, because I picture a concessionaire doing something flashy like that along with corporate signage to put their name in front of the press. It also makes sense to me that the Fair corporation may have realized late in the game that they needed free food to keep the press happier to be there for extended periods. When I and some colleagues once got a behind the scenes tour of the ball parks in Chicago (because a fellow Zenith employee moonlighted as coordinator for internal team videos), we enjoyed the free lunch in the press box.
RCA did have a room in the Press Building. Also as indicated by the prints, all communications over the loudspeakers originated in the Press Building ("control room of sound system")
What surprises me is the fact that the roof is painted. Look at all the Pavilion roofs in aerial shots, and maybe you have a handful which thought it might be a good idea to either put advertising on or finish the roof (Equitable, Denmark, etc. I'm not talking about full blown artistic efforts like Travelers, GE, Indonesia, etc.)
The fact that is was painted so brightly has to account for its noticeability if nothing else. Just look at the roofs of the surrounding buildings.
But the fact that it is next to sub-station #2, and behind the Press Building, it's not located in a prime traffic area. If I had to guess, I'd say it was a Maintenance Annex Building.
But the roof is a mystery.