Sansanin Frederiksborg, daga baya Sansanin Royal, ɗan Danish ne kuma daga baya sansanin Ingilishi a kan Gold Coast a Ghana ta zamani. An gina shi a cikin 1661, tare da amincewar Sarkin Fetu, 'yan ɗari ɗari daga Castle na Cape Coast, wanda a lokacin yana hannun Sweden, a kan Tudun Amanfro. Frederiksborg ƙaramin ƙauye ne wanda za'a iya jefa bam ɗin da ke cikin Castle Cape. Ya yi aiki na ɗan gajeren lokaci a matsayin hedkwatar Kamfanin Danish West India Company a kan Kogin Gold na Danish, kafin a koma da shi zuwa Castleborg Castle a Osu. Bayan Ingilishi a cikin 1665 ya karɓi Castle na Cape Coast, ya ƙarfafa shi, kuma ya yi amfani da shi a matsayin sabon hedkwatar su, Danes ɗin ba su da amfani da ƙarfin su. An fara murƙushe katangar ga Ingilishi a cikin 1679 kafin a ƙarshe aka sayar musu a 1685. Ingilishi ya sake gina sansanin a 1699 kuma ya sake masa suna Sansanin Royal. Ba da daɗewa ba suka sake watsi da shi, duk da haka. Van Dantzig, Albert (1999). Forts and Castles of Ghana.