11_diagonal_street | location | south_africa <tsp> south_africa | ethnicgroup | asian_south_africans <tsp> south_africa | capital | cape_town <tsp> south_africa | leadername | cyril_ramaphosa <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 ethnic groups in south africa. led by cyril ramaphosa. are the asian south africans and the coloured people. the country 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