Otto studied architecture in Berlin before being drafted into the Luftwaffe as a fighter pilot in the last years of World War II. It is said that he was interred in a French POW camp and, with his aviation engineering training and lack of material and an urgent need for housing, began experimenting with tents for shelter. After the war he studied briefly in the US and visited Erich Mendelsohn, Mies van der Rohe, Richard Neutra, and Frank Lloyd Wright. He began private practice in Germany in 1952. His saddle-shaped cable-net music pavilion at the Bundesgartenschau Kassel in Stuttgart brought him his first significant attention. He earned a doctorate about tensioned constructions in 1954.
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