Pointe Noire's (Black Point) name originated from Portuguese navigators who saw a block of black rocks on the headland in 1484. From then on, Pointe Noire, called Ponta Negra, became a maritime reference, and then a small fishing village from 1883, after the French signed a treaty with local people, Loangos.
In 1910, French Equatorial Africa (Afrique équatoriale française, AEF) was created, and French companies were allowed to exploit the Middle Congo (modern-day Congo Brazzaville). It soon became necessary to build a railroad that would connect Brazzaville, the terminus of the river navigation on the Congo River and the Ubangui River, with the Atlantic coast. As rapids make it impossible to navigate on the Congo River past Brazzaville, and the coastal railroad terminus site had to allow for the construction of a deep-sea port, authorities chose the site of Ponta Negra instead of Libreville as originally envisaged. Construction of the Congo-Ocean Railway began in 1921, and led to the foundation of Pointe-Noire on 22 May 1922.
In 1927, drinking water became available in the city, which had about 3,000 inhabitants. The airport was built in 1932. In 1934, Governor Raphael Antonetti inaugurated the Congo-Ocean Railway. The first hospital was built in 1936. That same year, Bank of West Africa (BAO) opened its first branch in the city. In 1942, the Pointe-Noire Harbour welcomed the first ship, and made the city the AEF's seaport.
In 1950, Pointe-Noire had 20,000 inhabitants, and became the capital of the Middle Congo, while Brazzaville was the capital city of the AEF. In 1957, the Middle-Congo became the Republic of Congo, although it was not still independent. Incidents which occurred during 1958 legislative elections led the leaders of the Democratic Union for the Defence of African Interests (Union démocratique pour la défense des interets africains, UDDIA) to transfer the capital to Brazzaville, since Pointe-Noire was
