For 10 points, name this type of structure, defined by its construction for a months-long international event like the 1893 Columbian Exposition in Chicago.
One building of this purpose was the centerpiece of the Little Norway living museum in Wisconsin, while a Chinese-built structure of this purpose was moved 150 miles to serve as a theater for Walla Walla Community College. Extant structures of this purpose include the Sunsphere in Knoxville, the Tower of the Americas in San Antonio, and one that opened as a Palace of Fine Arts but now hosts the Museum of Science and Industry in Chicago. One structure of this purpose is a tower built in conjunction with a 1962 ► event in Seattle, the Space Needle. Many of these structures were temporary pavilions built by companies or countries, and few remained in sites like Jackson Park and Flushing Meadows after the year or two of their use. For 10 points, name this type of structure, defined by its construction for a months-long international event like the 1893 Columbian Exposition in Chicago.
One building of this purpose was the centerpiece of the Little Norway living museum in Wisconsin, while a Chinese-built structure of this purpose was moved 150 miles to serve as a theater for Walla Walla Community College.
buildings (or structures) constructed for World's Fairs [accept mentions of pavilions even though not all structures were pavilions at their respective world's fairs; accept mentions of specific world's fairs]