Castello svevo angioino, Medieval castle in Manfredonia, Italy.

Castello Svevo Angioino is a fortress in central Manfredonia, begun in 1279 to a design by Pietro d'Angicourt. Its quadrilateral core has four corner towers enclosed in cylindrical turrets, and a later outer Aragonese wall adds four lower cylindrical towers. A pentagonal bastion called dell'Annunziata stands on the west side.

The first documents mentioning the castle date from April 1279, when workers were recruited to begin construction; Charles I of Anjou may have incorporated pre-existing structures. The original design is attributed to Pietro d'Angicourt, and the building was not a single project but grew through successive phases. In 1442 the Aragonese added an outer wall circuit around the earlier complex.

The pentagonal western bastion is called dell'Annunziata after a marble relief above its outer corridor showing the Annunciation. The castle's name recalls the Swabian, Angevin and Aragonese phases that shaped it, and since 1968 it has housed Manfredonia's national archaeological museum.

The fortress is freely accessible and allows visitors to walk the ramparts with clear views toward the beach, port, and lighthouse in the distance. The pathways along the walls offer different vantage points for exploring at your own pace.

The Museo archeologico nazionale di Manfredonia has occupied the castle since the Italian state received it in 1968, on condition that a museum be created inside. The collection displays finds from the Daunian and Roman periods of the Gargano and the Tavoliere plain, not from a sunken city.