La conquista castellana de 1434 Historical milestone · Castellar de la Frontera, Campo de Gibraltar, Cádiz Image of Castellar de la Frontera, not of the place itself. The castle of Castellar was taken for the Crown of Castile in 1434 by Juan de Saavedra, an event that gave rise to the later lordship of the Saavedra family over the town. 1434 Photo: Luis Rogelio HM (CC BY-SA 2.0) What to see and do in Castellar de la Frontera