Fundación de Chiclana de la Frontera Historical milestone · Chiclana de la Frontera, Bahía de Cádiz, Cádiz Image of Chiclana de la Frontera, not of the place itself. King Ferdinand IV of Castile founded the town in 1303, granting its lands to the House of Medina Sidonia. 1303 Photo: Xemenendura (CC BY-SA 4.0) What to see and do in Chiclana de la Frontera