It is the best preserved tartésico of the Iberian peninsula, the original building dating back to at least the sixth century BC, although the building was extended and modified in later centuries. Field certainly represents a unique and exceptional, both in shape, size and condition, as found objects, which allow creation date around 550 BC, while its destruction would not be back to 370 BC, caused by fire, either accidental or intentional, within some kind of religious rite. The main body of the building, a square, is oriented to the east, and is surrounded by a shallow pit containing water permanently; apparently the idea was that the builders kept a sheet of water throughout the year. Although it is unknown exactly its function, it is undeniable religious altars because it contains; although it can also be a palace-sanctuary, judging by their defensive device.