The Chapel of Nossa Senhora de Baluarte sits inside the fortress complex, small enough to miss if you rush. Its pale stone, ribbed vaulting, and sea-edge position make it one of the island's most beautiful architectural moments.
The chapel is not grand in scale, but it is grand in implication: a fragment of early Portuguese expansion preserved on a coral island off northern Mozambique. Visit it together with the fortress so the religious and military ambitions of the place sit side by side.