One of the evidences of the island's historic past (aside from the famous Capul Island Lighthouse) is the San Ignacio De Loyola Parish, a 400-year old stone church that has been declared as a National Cultural Treasure by the National Museum of the Philippines in 2014. The church is surrounded by stone walls connoting that it was more than a house of worship, as it was also a fortress and a refuge of the Capuleños during the times of Moro raids. At present it looked like a mini-Intramuros.
The island is now called Capul from the word Acapulco, a contraction of the name Acapulco in Mexico where the galleon trade with Manila flourished. During the Spanish era, it became a frequent stop-over for galleons that came in and out of the Philippines during the Acapulco Trade. The island was a safe harbor for galleon traders when strong currents prevailed.