Adelaide's central shopping area, Rundle Mall, is home to the sculpture popularly referred to as the Mall's Balls. The official tile of the sculpture is 'Spheres' and it is the work of sculptor Bert Flugelman. The spheres are made of polished stainless steel and each has a diameter of 2.15 metres. The sculpture was commissioned by Adelaide City Council in 1977 for the new Rundle Mall and was donated by the Hindmarsh Building Society to mark the Society's centenary. The Mall's Balls are now a popular meeting place.