The Municipality of Bucharest (the capital of Romania) is divided into 6 administrative units, named sectors (sectoare in Romanian), each of which has its own mayor and council, and has responsibility over local affairs, such as secondary streets, parks, schools and the cleaning services.
Each of the 6 sectors contains a number of informal districts (cartiere) which have no administrative function: Initially, Bucharest was divided into plăși.
Roșu, the smallest, composed of the commercial center and a narrow strip on the right bank of the Dâmbovița River, was disbanded at the beginning of the 20th century, its territory divided among the other four.
After World War I, each of the four culori, also called sectoare by this time, was given its own mayor and council.
At the beginning of Ion Antonescu's regime, the culori were briefly abolished but restored several months later.