Castle of rectangular plant, with two angles formed by towers. Was built by Dom Dinis in the 13th century. In one of the entrance doors is the Royal Crown and coat of Dom Manuel. Currently, only cloths of wall, some of whom integrated into buildings, the Door of the conception and the Tower of the Cuirass.

It is believed that this castle was built prior to nationality, during the reign of Alfonso IX of León. Later, the King Dom Dinis regained much of that region, ordering works of restoration and expansion in their strongholds. Dom Manuel I gave new Charter to village, taking place new restoration. Currently, there are two square towers, one of the entrance doors bears the Royal Crown and coat of Dom Manuel. The wall that surrounded the village has nothing left.

Castle located on top of a rocky cliff, enjoying a privileged position as a viewpoint, the exact date of its construction is unknown, but it is assumed that it was built by Mendo Rufino, during the reign of King Afonso Henriques or during the reign of King Sancho I. From the castle, currently in a precarious state of conservation, remain some turrets, a small courtyard and the Keep, inside which three records of occupation are visible, the first two of use for housing and the last of defense. It belonged to the group of castles that formed the defense line …

Human occupation at this site dates back to the Iron Age. The castle is built on a hillock overlooking a brook, and it was used to protect the river port (that established a connection between the town and the sea) and to defend the local population from enemy attack. Two towers form part of the vast walled defence structure. From the top of the defensive walls one can see the plain and the hills that roll right up to Monte Clérigo beach.

Located on a rocky Islet in the river Tagus, a Templar Castle warrant lift by Gualdim Pais, in the 12th century. Previously, it is believed to have existed a castro lusitano, improved by the Romans. The walls are flanked by ten towers that surround the keep and which gave the set an important defensive capabilities. Inside, there are several monumental doors that make communication between the different parts of the Castle. The access is made by river in a small boat crossing, lasting about five minutes.

Fortification with probable origins of the Castro culture, rebuilt in the medieval period, around the 12th century. Are still visible the ruins of the ancient wall around the village, which they realize its oval plant.

The castle is only a small part of the wall, knowing, however, that this castle was built on land offered to the Crusaders who helped conquer the region from the Moors.

It is a fortified manor house from the 15th century, rare in Portugal. The dependencies are organized around a central courtyard, with characteristics of military and residential architecture. The keep and some wall sections stand out. At the base, there is a cushioned ashlar from the Roman period. Above the portal of the castle-citadel are the coat of arms of the marquises of Alvito.

Castle raised during the Romanesque period, with elements characteristic of the military architecture of this period, as the keep crowned by merlons and Camino de ronda. Both its deployment in the territory as the various documentary sources attest to its existence at this time. Is closely related to the nearby monastery of St. Benedict of Arnoia where you will find some Romanesque traces.

Romanesque-Gothic Castle built in the early 14th century, formed by two fortified sets. The fence is square and is defended by a turret and with two entries, the Santarém port and the port of the village. The Palace of the mayors, in conjunction with the wall of the fence on the northern façade was redesigned in 1480. The clock tower has moth manuelina. In the middle of the walled enclosure is the ancient parish church, a 16th century building quite damaged.