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 <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 
11 diagonal street is in south africa. (the capital of which is cape town). a country where white south africans are one of the ethnic groups and cyril ramaphosa is one of the leaders.11 diagonal street is an office tower in johannesburg, south africa