Csaba B.
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Cádiz, Castillo de Santa Catalina, the castle is the oldest military construction in Cádiz city, and is a good example of historic preservation. Situated to the north of Playa La Caleta and Castillo San Sebastian, it is well worth a visit. Construction started in April: 1598, led by architect and military engineer, Cristóbal de Rojas. The castle was completed exactly 23 years later, in September 1621, at the end of Felipe III's reign.