Osu Castle
Osu Castle (also known as Fort Christiansborg or Christiansborg Castle) is a castle located in Osu, a neighborhood of Accra, the capital city of Ghana, on the coast of the Gulf of Guinea. A substantial fort was built by Denmark-Norway in the 1660s; thereafter, the fort changed ownership between Denmark-Norway, Portugal, the Akwamu, Britain, and finally post-Independence Ghana.