Sunnyside is one of the oldest suburbs of the city of Pretoria, South Africa. The well-established area is situated east of Nelson Mandela drive, adjacent to Pretoria Central. Sunnyside of the late 19th and early 20th century was a suburb of houses and mansions. Esselen street was named after Ewald Auguste Esselen, the State Attorney of the South African …Sunnyside is one of the oldest suburbs of the city of Pretoria, South Africa. The well-established area is situated east of Nelson Mandela drive, adjacent to Pretoria Central. Sunnyside of the late 19th and early 20th century was a suburb of houses and mansions. Esselen street was named after Ewald Auguste Esselen, the State Attorney of the South African Republic from 1894 to 1895. Since 2012 the street has been renamed to Robert Sobukwe street. The character of the suburb changed with the influx of mainly Afrikaners to Pretoria during the middle to late 20th century, when blocks of high-rise flats transformed the western section. The one time house of the writer and poet Jan F. E. Celliers however survived until 1970.