19 forts, 3 castles, and several other sites important to Portuguese Atlantic trade in the 15th through 18th Centuries have been inscribed as UNESCO World Heritage sites.
The historic forts and castles along the coast of Ghana are the remains of sites that acted as protected trading-posts that were built over a three hundred year period between 1482 and 1786. These castles and forts were mostly built by the Portuguese and at times occupied by traders from Britain, German, Denmark, Portugal, Spain, Sweden and the Netherlands. These forts and castles were originally built by the Portuguese to link together their trade routes during the Age of Discovery and the rise of the Portuguese Empire.