Tower of the Grand Prior Monument · Alcázar de San Juan, La Mancha, Ciudad Real The Torreón del Gran Prior is a fortified tower at number 6 calle de Don Quijote, in Alcázar de San Juan, which formed part of the palatial complex of the Grand Prior of the Order of Saint John. It is an Almohad tower of square plan, built in the 13th century, with three storeys reached by a spiral staircase. On 30 November 1990 it was declared a Bien de Interés Cultural (Spain's highest level of heritage protection) with the rank of monument, by royal decree published in the Boletín Oficial del Estado on 4 December of that same year. It is today the monumental symbol of Alcázar de San Juan. Photo: Zarateman (CC0) What to see and do in Alcázar de San Juan