A Neolithic defensive hillfort, likely rebuilt and reoccupied by the Romans until the 1st century. In 1160, Dom Afonso Henriques donated it to the Templars, who were to have built a castle there. However, this never came to fruition.

Of the original castle, only a portion of the citadel remains, along with some sections of the walls interrupted by turrets, and the Porta da Traição (Traitor's Gate). Several entrances open into the castle's surrounding walls: the Porta da Senhora do Amparo (Lady of Protection), the Porta Falsa (False Gate), and the Postigo. Still standing, but badly damaged, is the keep.

Located on a hill at an altitude of approximately 800 meters, in the foothills of the Serra da Estrela mountain range, this castle is believed to have been a fortified settlement occupied by the Romans and destroyed by the Moors in the 9th century, before being reclaimed by King Dinis. Only the enclosure defined by two towers with several floors remains.

Castle where some sections of the medieval wall and the north tower are still visible. Of the 17th-century fortified perimeter, the moat and counterscarp are largely preserved, along with bastions, gates and barracks. The castle has two of its six towers, with a rectangular plan. The Manueline molding stands out in the western tower. A large hall, with two naves divided by strong ashlar pillars, has a groin vault. Ordered to be rebuilt by King Dinis in 1310, it is assumed that fortifications existed in this area of ​​Campo Maior since Roman or Visigothic times. During the reign of King …

Originally called "Viana de a par de Alvito," the town was repopulated in the 13th century by King Gil Martins. In 1313, King Dinis granted it a charter and privileges and ordered the construction of the castle, which, rebuilt by King João II, still retains the characteristics of the original design. It is a pentagonal monument with cylindrical towers with cruciform arrow slits at its corners.

Aguiar Castle is a unique rock castle, whose current structure dates back to the 9th or 10th centuries. Situated on a massive granite boulder, archaeological finds have revealed three major levels of occupation: Prehistoric, Celtic, and Roman. Access to the building is via an entrance with six staircases, beneath an ogival portal. Climbing some rocks leads to the highest point, from which a sweeping panorama over the entire Aguiar Valley is offered. The building includes a vaulted-ceilinged room, as well as the embrasure room, a window with privileged strategic visibility.

This 15th-century monument is currently in ruins. Highlights include a sign with a poem by Engineer Mário Cruzeiro.

According to legend, the foundation of this castle began with a hillfort that allowed Viriato's companions to withstand a seven-year siege. Later, it also withstood Arab, Castilian, and French attacks. It is located amidst a rocky outcrop, at a strategic lookout point. Dom Afonso Henriques granted it a charter in 1174 and donated it to the Templars, who built the castle. Of the imposing medieval fortress, only the quadrangular Torre de Lucena and Torre do Pião remain.

The castle was built during the reign of Dom Sancho I, on the ruins of an older fortification. During Dom Fernando's reign, it underwent restoration work and, in 1755, suffered extensive damage in an earthquake. Later, French invaders left the castle in a state of great degradation, which led to its complete abandonment. Today, it preserves some 14th-century towers, including the keep. The castle grounds have been transformed into a garden and are a pleasant place for leisure.

On the northern slope of the Castle Hill, the possible Roman city forum creates an artificial platform, supporting the imposing monumental complex of the city of Myrtilis. This entire platform, leaning against the wall, rested on a solid underground gallery approximately 30 meters long and 6 meters high. In Late Antiquity, in the 5th and 6th centuries, lavish religious buildings were erected here; among them, a possible Episcopal Palace and a baptistery, of which significant fragments of a beautiful set of polychrome mosaics remain. During the Islamic period, during the 12th and 13th centuries, this entire area was occupied by …