 The name was first documented in 1033 as "Montis Lanutus" referring to São Félix Hill.Its arid soil didn’t help in developing an appropriate Castro town like in neighbouring Cividade Hill in the parish of Terroso despite its rise, but Castro ruins from the 2nd century BC are known, probably a north surveillance post of Cividade de Terroso.Ancient Castro culture jewellery were found complete and are important for the jewel history of North-western Iberian Peninsula.