of the fortress of São João Baptista, and carved-out trenches around the building in order to defend the site; Manor of Nossa Senhora dos Remédios (), a former-residence of the Canto e Castro family, the 16th century manorhouse was constructed from the residential home of by Pero Anes do Canto, who was nominated as the first Provisionor-of-Arms (in 1527). Responsible for supporting the caravels and carracks that transited the Atlantic, the medieval post was centred in the manorhouse and his descendants expanded the group of buildings, including the large chapel, attributed to Pero's great-great-grandson; Manor of the Count of Vila Flor (); Palace of the Bettencourts (), a 17th-century building, originally a private home, that houses the public library and regional archives, that includes a repository of 400,000 books and two million documents; Palace of the Captains-General (), located near the Largo Prior do Crato, the 16th century building, is intimately linked to the history : it was originally the Jesuit College of Saint Ignatius and later College of the Society of Jesus, before it was abandoned in 1759. When the office of Captain-General was created in 1766, the building was converted into the official residence of the Crowns representatives in the Azores, controlling the military, political, and administrative life of the archipelago; Residence of Quinta de Nossa Senhora da Oliveira () Cais da Alfândega Cais da Silveira Câmara Municipal de Angra do Heroísmo Porto das Cinco Ribeiras Military The island of Terceira, dating from the 15th century had always been susceptible to attacks by pirates and privateers, first from Barbary coast pirates, but later by European powers who sought to capture spoils from the ships returning from the Far East. Following the personal union between Spain and Portugal, following the Dynastic Crisis, the need to protect the transit points of the Azores led to construction of several posts and redoubts along the coast of the island. Among the most important were: Castle of Moinhos (), known as the Castle of São Cristóvão, or Castle/Fort of São Luís, is the ruins of a 16th-century fortification overlooking the city of Angra, today surmounted by the Alto da Memória, a 19th-century obelisk dedicated to former King Peter IV of Portugal, whose forces defeated the absolute monarchy of his brother Miguel during the Liberal Wars; Fort of Cinco Ribeiras Fort of Greta Fort of Má Ferramenta (), used throughout the 16th to 20th