Republic of the Congo (Léopoldville)
The Republic of the Congo () was a sovereign state in Central Africa that was created with the independence of the Belgian Congo in 1960. From 1960 to 1966, the country was often known as "Congo-Léopoldville" (after its capital) in order to distinguish it from its north-western neighbour, also called the Republic of the Congo or Congo-Brazzaville. With the renaming of Léopoldville as Kinshasa on 1 June 1966, it was known as "Congo-Kinshasa" until 1971.
Pool Malebo
The capitals of the Democratic Republic of the Congo and the Republic of the Congo—Kinshasa and Brazzaville, respectively—are located on opposite shores of Pool Malebo. These are the two closest capital cities in the world (other than Rome, Italy and Vatican City, which are actually contiguous).