Etymology of Saturnino:

Derived from the Latin Saturninus, meaning ‘melancholic in character’.
The statue at the top of spire G23 has been the subject of a long debate regarding its identification. Based on the archive sources of the Veneranda Fabbrica, two possibilities remain. Some identify the figure as the martyr Tranquillinus (from the Latin Tranquillus or “calm”), who lived in the 3rd century AD. He was the father of saints Mark and Marcellian of Rome and was martyred while praying at the tomb of the Apostle Paul, where he was stoned and his body thrown into the Tiber river.
Other hypotheses suggest the subject is Saint Saturninus of Cagliari, a widely worshipped figure in Sardinia. Young Saturninus was reportedly beheaded in 304 AD, during Diocletian’s persecutions, for refusing to offer sacrifices to pagan gods. His story follows that of Saint Saturninus, Bishop of Toulouse, and Saint Sergius. Further theories propose he might be an African martyr venerated in Sardinia, due to historical contacts between the island and Africa, though it is difficult to identify which specific Saturninus he might be. He is celebrated on October 30th, particularly in Cagliari, where his relics are preserved.

The tales of the statue in the Duomo’s building site:

The statue currently seen on the Milan Cathedral is a 1953 reproduction by the sculptor Mario Bassetti. This work was created using the original statue by Arturo Malerba as a model.