1417~1431: Serpent found in Solid Marble

In a translation published in 1649 of older manuscripts by Ambroise Paré [1510-1590], chief surgeon to Henry III of France, Paré states that he had seen an account by a man named Baptista Leo recording that in the time of Pope Martin the Fifth [1369-1431], a serpent was discovered, alive, encased in a large, solid chunk of marble stone. There was no visible crack or hole that could allow the serpent either entry or air within the rock.

        Since Pope Martin V was in power under that name between 1417 and 1431, I've set this as the time range for the incident.