The Fortress of St. John of Monte Brasil, also known as the Fort of São Filipe, is a historic fortress located in Angra do Heroísmo, Terceira, Azores. Built in the 16th century to defend against pirates and privateers, it played a crucial role during the Iberian Union and Portuguese Restoration. Over the years, it served various purposes, from protecting the port to housing political prisoners. Today, it stands as a reminder of the island's rich history and is open to the public for exploration and learning about its fascinating past.