The Castle of the Moors is a hilltop medieval castle built by the Moors in the 8th and 9th centuries. It was an important strategic point during the Reconquista, and was taken by Christian forces after the fall of Lisbon in 1147. It is classified as a National Monument, part of the Sintra Cultural Landscape, a UNESCO World Heritage Site.
During the second half of the 12th century, the chapel constructed within the walls of the castle became the parish seat. This was followed by the remodelling and construction under the initiative of King Sancho I of Portugal. In 1375 King Ferdinand I of Portugal, under the counsel of João Annes de Almada, ordered the rebuilding of the castle. While the structure was well fortified by 1383, its military importance was progressively diminishing as, more and more, the inhabitants were abandoning the castle for the old village of Sintra.
By 1493 this chapel was abandoned and later only used by the small Jewish community of the parish. The Jews occupying and using the structures in the castle were expelled by Manuel I of Portugal, and the castle was completely abandoned.
The 1755 Lisbon earthquake caused considerable damage to the chapel and affected the stability of the castle. By 1838 the towers were already in ruins, when in 1840 Ferdinand II of Portugal took up the task of conserving and improving the condition of the castle.
References:The Church of St Donatus name refers to Donatus of Zadar, who began construction on this church in the 9th century and ended it on the northeastern part of the Roman forum. It is the largest Pre-Romanesque building in Croatia.
The beginning of the building of the church was placed to the second half of the 8th century, and it is supposed to have been completed in the 9th century. The Zadar bishop and diplomat Donat (8th and 9th centuries) is credited with the building of the church. He led the representations of the Dalmatian cities to Constantinople and Charles the Great, which is why this church bears slight resemblance to Charlemagne's court chapels, especially the one in Aachen, and also to the Basilica of San Vitale in Ravenna. It belongs to the Pre-Romanesque architectural period.
The circular church, formerly domed, is 27 m high and is characterised by simplicity and technical primitivism.