The fort was damaged during the 1755 earthquake and the Command House, then the residence of the Governor of Setúbal, was destroyed by fire in the mid-19th century. It was classified as a National Monument in 1933 and was included in the Nature Park of Arrábida when that was established in 1976. Conservation work was undertaken in the 1940s and in 1962 parts were converted to a hotel, which opened in 1965 as part of the Pousadas de Portugal chain. Some damage occurred as a result of an earthquake in February, 1969. Repairs and further conservation work have been carried out since then but the hotel closed in 2014 due to problems of structural instability. The fort was reopened to the public on 31 March 2017, under the management of the city council, with an information centre and restaurant.