Soyo

Soyo (formerly known as Santo António do Zaire) is a city, with a population of 200,920 (2014 census), and a municipality, with a population of 227,175 (2014 census), located in the province of Zaire in Angola, at the mouth of the Congo river. Historically, Soyo was a significant city in conflicts between the Kingdom of Kongo, Portuguese Angola, and the Dutch West India Company. Soyo became an independent state in the 17th century and had significant influence on politics in Kongo during the Kongo Civil War.
Soyo has recently become the largest oil-producing region in Angola, with an estimated production of 1,200,000 barrels per day (190,000 m3/d).