Building of the fort of Saint John the Baptist of the Berlengas began in 1651, as a result of Algerian and Moroccan attacks on the islands. Already by 1655, while still under construction, the fort had successfully defended against an attack by a three-ship Turk squadron.
During the next two centuries, the fort was from time to time occupied by the Spanish (1666), the British, and later the French during the Napoleonic Wars. A few years later, the fort was a forward base for forces loyal to the recently abdicated Emperor of Brazil (i.e., loyal to Emperor Pedro I of Brazil, who was also King Pedro IV of Portugal) during the Portuguese Liberal Wars.
We anchored off at night and were greeted by this sight in the morning.
Berlenga Grande Island, Berlengas archipelago, 14 October 2015, 7:53AM. Leica Typ 114.