 Other original elements of the Sardinian civilization include the temples known as "Sacred Pits", perhaps dedicated to the holy water related to the Moon and astronomical cycles, the Giants' graves, the Megaron temples, several structures for juridical and leisure functions, and some refined statuettes.Some of them have been discovered in Etruscan tombs, suggesting a strong relationship between the two peoples.Italy gradually enters the proto-historical period in the 8th century BCE, with the introduction of the Phoenician script and its adaptation in various regional variants.