Portuguese Network of Heritage of Humanity — UNESCO Historical Centre of Angra do Heroísmo in the Azores Date of registration: 1983 criteria: (IV) (vi) Situated in the island of Terceira in the Azores archipelago, the city was a mandatory port of call from the 15th century to the advent of the steam ship in the 19th century. The fortifications of São Sebastião and São João Batista of the 16th century are unique examples of military architecture. Angra do Heroísmo was restored after being damaged by a terremote...