Forte de São Francisco Xavier de Piratininga, Military fort at Inhoã Cove, Vitória, Brazil.

Forte de São Francisco Xavier de Piratininga is a circular coastal fortification on the shores of Vitória Bay. The structure features multiple raised gun positions and was designed to command the southern approach to the bay.

Work on the fort began in 1702 under Governor and Captain General Rodrigo da Costa, during the reign of King Pedro II, as recorded on the plaque above the archway. It replaced an earlier fortification begun near Penha Hill in 1535. In 1726 the engineer Nicolau de Abreu Carvalho gave it a circular layout with fifteen guns, and it was renovated again in 1767.

The fort's name references a Catholic saint and connects to the region's early missionary history. Inside, the stone walls and cannon placements still show traces of its long use as a military stronghold.

Visits require advance reservation since the site remains under active military occupation. It is best to contact the responsible department beforehand to confirm access conditions and timing.

The balustrade of an interior staircase is built from iron anchors, and a navy mast stands on the grounds, both left from the fort's years under the Brazilian Navy. The site housed the first School of Apprentice Sailors of Espírito Santo, whose first commander was Lieutenant-Captain José Lopes de Sá.