In Montreal, Canada, there’s an unusual modernist structure - on an island. Designed by Buckminster Fuller as the US pavilion for the 1967 World’s Fair, or what everyone else on the planet calls the World Expo, the Biosphere attracted more than 5 million visitors, and today the site is a museum dedicated to the environment. In case you are a dome geek, and we know there are some out there, the Biosphere is a Class 1 icosahedral dome, as opposed to a Class 2 dodecahedral or a Class 3 tetrahedral.  Just sayin’.  It’s a 32-frequency version where the inner and outer layers are connected by latticework standing two hundred feet high and covered by 1,900 acrylic panels.  Joining us today from Montreal is Michele Picard from Montreal's Bureau of Public Art, plus from New York, an expert on World’s Fair history, Beverly Payeff Masey.