Fort Prinzenstein (Danish: Fort Prinsensten) babban birni ne wanda yake a Keta, Ghana wanda aka yi amfani da shi wajen cinikin bayi. Yawancin irin waɗannan katanga an gina su a Afirka, amma Prinzenstein na ɗaya daga cikin fewan kaɗan da suke gabashin gabashin Kogin Volta. Keta tayi aiki a matsayin tashar budewa har zuwa tashar Tema Harbor ta fara aikinta zuwa yamma a shekarar 1962. An sanya sansanin soja a matsayin kayan tarihin Duniya. 'Yan kasuwar Denmark ne suka fara gina shi a shekarar 1784 don dalilai na kariya bayan yakin Sagbadre da Anlo Ewe da kuma kiyaye yankin daga sauran ikon mallaka. Mafi yawan kayan, musamman dutsen da aka yi amfani da shi don ginin sansanin, sun fito ne daga Accra. Fortasashen yana daga cikin manyan gine-gine huɗu waɗanda Danishan Danish suka gina. Thearshen ya taka muhimmiyar rawa a cikin cinikin bayi, wanda ya shafi Turawa a Afirka ta Yamma. Baya ga cinikin bayi, sansanin ya yi aiki mai ma'ana a cikin kasuwancin shigo da fitar da kayayyaki irin su zinariya da hauren giwa a cikin bayarwa da-dauki don muskets, brandy, sandunan ƙarfe, kayan sawa, baƙuwar rogo da sauransu.