The facility features a modern expressionist design, with a series of large precast concrete "shells", Shells of the Sydney Opera House, The Royal Society of New South Wales each composed of sections of a sphere of 75 meters radius, [http://nsw.royalsoc.org.au/journal_archive/106_12_lewis_2.html "Roof Cladding of the Sydney Opera House", Journal and Proceedings of the Royal Society of New South Wales, Volume 106 Parts 1 and 2, pp.