Inside the tower, we can admire the original metal discs of the clock. We can see the larger one, the zodiacal, and the one in which appears the figures corresponding to the division on lunar days. The disk on which the zodiac signs are located in is itself an artwork. They are engraved with great skill by an unknown master, who has probably put all possible care in illustrating the seasonal principles in which the time of the year was divided. From the distant past, through Babylon and Greece, faith in the signs comes to the Middle Ages and the Renaissance, remaining in the midst of heated debates, basically intact.