The Republic of the Congo–Democratic Republic of the Congo relations or the Brazzaville-Kinshasa relations refers to the bilateral relations of the Republic of the Congo (Brazzaville) and the Democratic Republic of the Congo (Kinshasa). The two nations share the basin of the Congo River after which both nations are named. The two nations' capital cities, Brazzaville and Kinshasa, are the two closest capital cities on Earth after Rome and the Vatican City and Vienna and Bratislava, facing each other on both sides of the Congo River.