The Cassero complex dominates the whole of the Valdichiana and still conserves the original characteristics and charm of a Medieval stronghold.  Its unequivocal profile makes it a landmark on the Castiglion Fiorentino skyline.

Already in the VIII century village huts covered the entire hill that later was encircled by a city wall defending the ancient Etruscan acropolis of Oppidum. In the centre was the splendid temple from the V century that came to light in the archaeological excavations that took place from 1980's onwards.

The Cassero as it is today, is a result of various transformations that have taken place from XI century when the area became the seat of a castle that controlled the ancient and very important road networks which were a long way from the marsh land but near enough to take advantage of the huge fish resources.