The Belvedere Castle of Fiumedinisi (ME) belongs to that historical heritage of Sicily characterized by abandoned and forgotten military architecture. Along the Ionian coast the defensive problem has been particularly felt over time, due to the proximity of the Turkish coast, the Middle East and the African one. The first defensive line was the coastal one, defined by principals placed on the sea in a strategic position for direct control of the coast.
Castles, often built on hills with extremely steep slopes, or on sea cliffs overlooking stretches of water, were difficult to conquer. Construction techniques and geomorphology of the area were a key factor in making castles impregnable to sieges of military troops or bands of pirates or robbers. Today, the same characteristics make them difficult to survey. In fact, there are huge difficulties in surveying fortified structures on the top of hills or on the edge of a precipice.
In the last 20 years the field of cultural heritage has experienced a revolution in terms of documentation methods. The latest technological advances in laser scanners and photogrammetry have opened the possibility of documenting in three dimensions all types of monuments and sites regardless of their size or complexity. In this revolution fortified spaces have not been an exception. Hundreds of research teams around the world have developed 3D digitization projects of castles and fortresses.
The use of digital documentation and registration techniques in Cultural Heritage is becoming more common every day, thanks to its ability to capture a large amount of data in a fast and efficient process. Its high geometric precision, thoroughness, performance retrieved and especially the generation of high fidelity and precision of architectural good assets make these tools optimal for the planimetric surveys.
Bairén Castle was built in the Almoravid period, carring out the function of border hisn of the Taifa of Dénia. It was the administrative, political and legal-religious center of more than 20 farmhouses or qurà and castles. At present is possible visit the castle, although only part of its walls and remains of ruins scattered throughout the hill remain.
Post-coastal towers or rural fortress towers, built in the sixteenth century on the Mediterranean coast, had the mission of protecting the population and enhancing the repopulation of these areas, heavily punished by incursions by berber pirates. The Negro Tower or Arráez Tower, in El Algar-Cartagena (Region of Murcia, Spain), is one of those post-coastal lookout towers and was built in 1585. It is shaped like a truncated pyramid, square plan and a height of about 14,00 m. Originally, it had three floors and a terrace.