Iglesia de Santa María de Orduña Monument · Urduña/Orduña, Arratia-Nerbioi, Bizkaia Gothic church integrated into the medieval walled enclosure and conceived as a genuine fortified church. It preserves the Ortés de Velasco chapel with a notable grille, the chapel of San Pedro with a Hispano-Flemish altarpiece, and a 17th-century Baroque altarpiece declared a Bien de Interés Cultural. Photo: Ebaki (CC BY-SA 4.0) What to see and do in Urduña/Orduña