Torre di Mare was founded in the 11th century and was built on the western edge of the ancient Greek city of Metaponto, whose ruins were used to recover materials for the construction of the new town. It consists of 3 groups of artefacts: the little church of San Leone and the annexed rectory house, the tavern (known as Torre di Mare) and the barracks of the coast guards, i.e. the diaziarie guards.
The small church, with the adjoining rectory, has a tower in the north-east corner, while to the east and north a scarp-shaped wall rises, outlining the annexation of these buildings to the fortress, as you can see the connections in the south-east corner of the church itself in the low spur of masonry, while to the north-west there are the remains of another tower.
The barracks of the coastguards also have a wall shaped like a shoe and a spur, there are also the remains of another tower.
The body of the building, called the tavern, looks like a large farm, which housed the stables on the ground floor, while the soprano the residential areas.
In 1119 the castrum Sanctae Trinitatis was chosen by Countess Emma Maccabeo di Montescaglioso as her family residence and by Umfredo’s will a "fortified tower" was erected with clear defensive functions along the coastline both for the surrounding area and for Montescaglioso itself, located not far inland. In fact, great relief covered the adjacent basin behind the dunes of Santa Pelagina with a landing place. Later the castrum was granted to the Benedictine monastery of San Michele Arcangelo of Montescaglioso.
