The castillo de Santa Ana, also known as Castillo de Las Roquetas, is a fortification built between the 16th and 17th centuries, located in the town of Roquetas de Mar which was used for refugee to the inhabitants who lived near the port. It has an oblong shape. Near the castle there is a lighthouse.
The 1804 earthquake destroyed most of the structure, and only survived one of the towers and the raised level area, which has been conserved and recovered.
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.