Gian Galeazzo Visconti (1351 - 1402) first Duke of Milan: the coat of arms with the crowned snake ingoiante a child; surrounded by an inscription that recalls the foundation of the Certosa di Pavia Gra-Car (Gratiarum Carthusia - Monastery of Santa Maria delle Grazie) ; which he built as a votive offering in 1396 and that his intention was supposed to house the remains of his dynasty. Engraving from "Milan en 1906" guide to the city by the City of Milan published in the year of the International Exhibition; edition out of print in French; Milan; 1906