The Fortress of Real Felipe was the biggest fort built by the Spaniards in the American continent. It was named after the recently deceased King Filipe V. of Spain. Later, the fortress played an important role in the struggle for the independence of Peru against Spain. The trapped Spaniards died of hunger slowly. Even after independence, the fortress was used as a defense against unwilling Spaniards again and again, sometimes serving as a political prison. Then it became a customs office, and then it served as a defense in the war with Chile. The fortress is located next to the port on its south side. Its particular location on the promontory, which stretches from the sea to Lima, made it possible to see the ships arriving from both the south and the north. The fortress has the shape of a pentagon. In each corner there is a bastion. The bastions were given a name: The King, The Queen, San Felipe, San Carlos and San José. The two beaches, El Rey and La Reina (in German king and queen) are the strongest and each has a tower. The Bastion of the King’s Tower should also serve as the last refuge in case of conquest of the fortress and, therefore, was protected by a moat and a drawbridge. The stones used for the construction came from the island of San Lorenzo, opposite the promontory.