Iglesia de Santa María de la Asunción de Lumbier Monument · Lumbier, Sangüesa, Navarra A 15th-century parish church, the town's main religious heritage. The municipal coat of arms, with a silver three-towered crenellated castle between an eight-pointed star and a crescent, already appears in the Carta de Unión (Charter of Union) of 1328. s. XV Photo: JLVwiki (CC BY-SA 4.0) What to see and do in Lumbier