Fort Apollonia was built by the British between 1765 and 1771, to ward off Dutch colonial ambitions. The abolition of the slave trade in the Gold Coast diminished the importance of the fort, as a result it became too expensive, so the British abandoned it in 1819 after which, the Dutch took ownership over the fort in 1868.
The trading Fort William was completed by 1757. It was built on hard rock near a sandy beach indentation with a sheltered harbour. The English had built a fort back in 1674 called Fort Charles which was destroyed to prevent it from being captured by other European companies. The English then hurried to construct Fort William.