Islote de Sancti Petri

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The Islote de Sancti Petri is a small barren island belonging to the municipality of San Fernando, Cádiz in the province of Cádiz and the autonomous region of Andalusia, Spain. It is close to the coast and 16 kilometres (10 mi) south of Cadiz city.

For many years, the island was a restricted military zone, but it is now under the control of the Spanish Environment Ministry. In the first century BC, the Greek historian Strabo mentioned in his book Geographica that the Tyrians founded Gadeira, building a sanctuary to Melkart, known as Hercules to the Greeks, in the eastern part of the island and the city in the western part.