English: As part of Adelaide's celebration of the Australian Bicentenary, the Bicentennial Conservatory was constructed in 1987 and opened in late 1989. The building was designed by local architect Guy Maron and has won awards for its design, engineering and landscaping. It is 100 metres (328 ft) long, 47 metres (154 ft) wide and 27 metres (89 ft) high making it the largest single span conservatory in the Southern Hemisphere. The conservatory originally housed at-risk or endangered tropical rainforest plants from northern Australia, Papua New Guinea, Indonesia and south Pacific Islands. However, in early 2012, a controversial decision was announced to remove tropical plants from the conservatory due to rising power costs.