Pretoria is a city located in the northern part of Gauteng Province, South Africa. 
It is one of the country's three capital cities, serving as the executive (administrative) and de facto national capital; the others are Cape Town, the legislative capital, and Bloemfontein, the judicial capital. Pretoria is contained within the City of Tshwane Metropolitan Municipality as one of several constituent former administrations (among which also Centurion and Soshanguve).
Pretoria itself is sometimes incorrectly referred to as "Tshwane" in a controversial proposed name change, the status of which is still being decided as at 2012.
The city's original name was Pretoria Philadelphia ("Pretoria of brotherly love"). It gave its name to the Pax Praetoriana, referring to the country's relative stability. Pretoria in South Africa is popularly known as The Jacaranda City due to the thousands of Jacaranda trees planted in its streets, parks and gardens.
Source : www.wikipedia.com 