History can be traced back to the Visigoth era. Some of the early walls were built by the Visigoths, and visitors could overlook the entire Lisbon landscape. The Teju River runs outside the fence. When visibility is good, landmarks can be seen from Alpha to Futurist castles and suspension bridges, as well as the open-air ruins of the Carmo Church in the city centre. From the time of Saint Denis to the time of Manuel, the castle was always a palace. Gorgeous gardens, quiet ponds, leisurely swans and peacocks decorate the inner city with elegance and luxury. The castle was occupied successively by Romans, Visigoths, Moors and Christians, and was repeatedly regarded as the centre of Portuguese military, government and administrative organs. In 1940, Salazar ordered the demolition of all buildings since Manuel. Most of the castles we see today were built during the Salazar period. The buildings and walls were built of stone left over from the original castle. Opening time: March to October 9:00-21:00; November to February 9:00-18:00. Tickets are 7.5 Euros.