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Jean Chalette, Astra medicea
Jean Chalette, Medicean stars

India ink pen; 31x21,5 cm
Carpentras, Bibliothèque Inguimbertine, Ms. 803, f. 285

Sketch of the title page for the publication of the telescopic observations of Nicolas-Claude Fabri de Peiresc. The "Medicean Planets", that is the satellites of Jupiter, are allegorically portrayed by the figures of the Grand Dukes: Cosmus mayor, Franciscus, Ferdinandus and Cosmus minor. The volume was to be dedicated to Maria de’ Medici, who dominates in the center, enthroned on Jupiter.