It was was opened in 1995 and cost over 100 million $CAN to build. There was a public referendum and then a design competition, and Moshe Safdie's strange and wonderful design was the winner.
Aside from the library, where I explored and found the best nooks to read while I was visiting, there's a sushi place in the outer spoke and a few other shops. This place is breathtaking but also comfortable. And a friend who works there admits there's a rooftop garden. I need to see it. One day.
It didn't surprise me when this building was shown in Battlestar Galactica as Cylon design. It's bizarre and beautiful and the kind of place that feels like it'll last.