CASTLES OF SPAIN - La Guardia de Jaén was founded 1500 years BC as the Iberian fortified settlement . After the Roman conquest, the town became the oppidum of Mentesa Bastetanorum. After the Moorish conquest, the town, renamed Mantissa, 7th century. The fortress, located on a strongly defended height, was deemed impregnable. Seized in 1244 by King Ferdinand III the Saint, the fortress was several times reconquered by the Moors, until the fall of Granada in 1492.