Trujillo Alcazaba was built originally the 12th century. The city changed hands several times between Christians and Arabs in the 12th century and was finally conquered by Fernando III in 1233. The castle was reformed after Reconquista and again in the 15th century.
Surviving years of abandonment, the French invasion, the Carlist War, the Republic and the Civil War, the Castle is the center of Trujillo’s life. It was declared a historical-artistic monument in 1925 and acquired by the city council in 1929. The last reforms that were made were the construction of a first chapel to house the stone image of the city’s patroness saint in 1546, and later, in 1951, the demolition of such chapel to build a larger one inside between the two main towers (albarran towers), from where the image of the Virgin remains today looking towards her town.
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.