Q - wussat all about?

This structure played a role in the history of Montreal. What was it?
Hint: We're gonna short-sheet you soon. Whatever it was, it is not associated with the year 1966 or ealier.
Time's up. This was a prototype of the structure that the Federal Republic of Germany selected as its Expo 67 pavilion. The above shot presents it around the time it was unveiled at a design fair in West Germany. As the original photo caption read: "You won't see this strangely shaped tent at local campgrounds--but if you're going to be in Montreal next summer, you'll find it at Expo 67 sheltering a display from Germany. The tent was developed by a German study group for industrial forms, and was presented at a recent show given by that group in Konstanz." (from Popular Mechanics, 1966.) And here it is a year later on steroids, with the Monorail zipping past. The concept, which -- though expensive -- was light, practical, easy to set up, and expandable to suit any kind of landscape, would also be adapted for the Olympic swimming area at the 1972 Munich summer games.
Frei Otto got credit for the idea. His partner's daughter, who lives in New York, still uses the look in her own designs.