The bartizan was integrated into the complex of fortifications that ringed the coast of Porto Pim, under the coordination of the Fort of São Sebastião.

[1] It was a simple watchtower with the function of guarding the southwest entrance into the bay.

[3][4] It was erected in the extreme western edge of the bay of Porto Pim, addorsed to the hexagonal plan of decorated stone.

The structure was implanted in the cliffs at the edge, with walls extending towards the direction of the bay.

The bartizan is a hexagonal structure with window surmounted by a pyramidal covering.