Danish colonialism into Ada in the 16th century saw development of a trading post in 1775. The name "Foah" comes from the word Fort, as from 1783,
Fort Kongenstein was built by the Danish and used in the
Transatlantic Slave Trade and Sub-Saharan Slave Trade. The fort was purchased by the English on 15 March 1850. Only traces of Fort Kongenstein are found in Ada, in the
Greater Accra Region. The port of Ada is located at the mouth of the Volta River. Ada people were sold and shipped to
the Americas through this fort as slaves. The fort has almost disappeared into the sea and is half eroded, gradually washing the building that once used to be a prison into the ocean. As rising water levels continues to jeopardise the coast and local communities, construction of the sea defence wall hope to stop this progress.
British colonial rule was imposed at the end of the 19th century. Trading with the Europeans in the transatlantic slave trade, Ada became a major market for the
slave trade in human exports. After the slave trade had been abolished, the
Dangmes traded products of the African tropical forests (mostly
palm oil,
palm kernels and
rubber). Ada used to be a major trading centre and trade was one of the main sources of income. There were large
warehouses for storing the trading goods close to the seaside. Its location at the
estuary ensured a quick transportation along the
Volta River up to the north of the country. ==Ada today==