Villarroya de la SierraVillarroya de la Sierra is a municipality in the Province of Zaragoza, Aragon, Spain. According to the 2004 census, the municipality has a population of 622 inhabitants.The town is located in the Sierra de la Virgen range.WWW villarroyadelasierra.comNotable peopleFrancisco Aranda Millán, Spanish zoologist