Large woodern cross to symbolize this land belong to Christians (or Portugal).
Large stone cross-shaped marker with the coat of arms of Portugal called padrão.
Stone pillar with the coat of arms of Portugal.
https://upload.wikimedia.org/wikipedia/commons/e/e0/Matadi%2C_Congo%2C_pedra_de_Ielala%2C_Diogo_C%C3%A3o.jpg
https://upload.wikimedia.org/wikipedia/commons/thumb/e/e8/Padr%C3%A3o_de_Santa_Maria,_de_Diogo_C%C3%A3o,_clich%C3%A9_de_um_sargento_canhoneiro_Cuanza,_fotos_para_a_exposi%C3%A7%C3%A3o_colonial_portuguesa_%281934%29.jpg/220px-Padr%C3%A3o_de_Santa_Maria,_de_Diogo_C%C3%A3o,_clich%C3%A9_de_um_sargento_canhoneiro_Cuanza,_fotos_para_a_exposi%C3%A7%C3%A3o_colonial_portuguesa_%281934%29.jpg