From Architecture of eden ,
pg 114 – The 60s and 70s saw a whole series of adventurous enclosures constructed from strong, lightweight acrylic sheeting.
in 1965 three domes were built in concrete and acrylic for the botanical gardens in Milwaukee, Wisconsin.
The exploration of plastic enclosures reached its zenith in 1967 with Fuller’s dome for the Montreal Exposition. Developed in conjunction with architects the Cambridge Seven, the dome demonstrated the notion of a ‘World within a world’. The original intention was that the skin would control the environment within, changing color to give shade from the sun. Fuller adapted this idea, using six fabric roller blinds as shades for each hexagonal panel. As they were opened or closed a dynamic skin of changing pix elated panels was created, a concept that has intrigued and inspired architects ever since.