Tower of el homenaje del castillo de Monzón Monument · Monzón, Cinca Medio, Huesca The castle of Monzón, a Templar stronghold in continuous use from the 12th to the 20th century, preserves its keep alongside the tower of Jaime I and the chapel of San Nicolás. Photo: ecelan (talk) (CC BY 2.5) What to see and do in Monzón