Pretoria is a city in the northern part of Gauteng Province, South Africa. It is one of the country's three capital cities, serving as the seat of the executive branch of government (Cape Town is the legislative capital and Bloemfontein the judicial capital). Pretoria has a reputation for being an academic city with three universities and the Council for Scientific and Industrial Research (CSIR) located in its eastern suburbs, the city also hosts the South African Bureau of Standards making the city a hub for research. Pretoria is the central part of the Tshwane Metropolitan Municipality which was formed by the amalgamation of several former local authorities including Centurion and Soshanguve. There have been proposals to change the name of Pretoria itself to Tshwane, and the proposed name change has caused some controversy. Pretoria is named after the Voortrekker leader Andries Pretorius, and within South Africa is popularly known as the "Jacaranda City" due to the thousands of Jacaranda trees planted in its streets, parks and gardens.