11_diagonal_street | location | south_africa <tsp> south_africa | capital | cape_town <tsp> south_africa | leadername | cyril_ramaphosa <tsp> south_africa | ethnicgroup | white_south_african <tsp> south_africa | ethnicgroup | coloured <sep> 11 diagonal street is an office tower in johannesburg, south africa it was built in 1983 to a height of 80 metres it is designed to look like a diamond as it reflects different views of the central business district from each angle of the buildingthe building's architect was helmut jahn 
two of the south african ethnic groups are the coloured people and the white south africans. the country. which has cyril ramaphosa as one of its leaders. is the location of 11 diagonal street and has the capital city of cape town.11 diagonal street is an office tower in johannesburg, south africa