These buildings, built from light sandstone, were designed by the architect Sir Herbert Baker in the English monumental style and are 285 m long. They have a semi-circular shape, with the two wings at the sides, this serves to represent the union of a formerly divided people. The clock chimes are identical to those of Big Ben in London. The east and west wings, as well as the twin-domed towers, represent two languages, English and Afrikaans, and the inner court was designed and built to symbolise the Union of South Africa. These buildings are considered by many to be the architect's greatest achievement and a South African architectural masterpiece. The Nelson Mandela statue in Sandton City's Nelson Mandela Square was commissioned originally to stand on the spot where Nelson Mandela gave his inaugural address.