Ponte City[1] is a skyscraper in the Berea neighbourhood, just next to Hillbrow, Johannesburg, South Africa. It was built in 1975 to a height of 173 m (567.6 ft), making it the tallest residential skyscraper in Africa. The 55-story building is cylindrical, with an open centre allowing additional light into the apartments. The centre space is known as "the core" and rises above an uneven rock floor. When built, Ponte City was seen as an extremely desirable address due to its views over all of Johannesburg and its surroundings. The neon sign on top of the building is the largest sign in the southern hemispher. It currently advertises the South African mobile phone company VodacomThe principal designer of Ponte was Mannie Feldman, working in a team together with Manfred Hermer and Rodney Grosskopf Grosskopff recalled the decision to make the building circular, the first cylindrical skyscraper in Africa.[6] At the time, Johannesburg bylaws required kitchens and bathrooms to have a window, so Grosskopff designed the building with a hollow interior, allowing light to enter the apartments from both sid[6] At the bottom of the immense building were retail stores and initial plans were to include an indoor ski slope on the 3,000-square-metre (32,000 sq ft) inner core floor.[6] The building was so tall because developers wanted a large number of units but only had limited land to build on.[6] The building is located 35 minutes from the OR Tambo International Airport and almost within walking distance of the inner city with theatres like the Market and the Civic within 5 km (3.1 mi).