School of Como, late 17th Century

细节
School of Como, late 17th Century
Design for a Fountain with Neptune riding a Chariot, and alternative side Elevations with Herons and Eagles
inscribed 'Coperta al Sig. Gio Batt. Con[g?]a in Como/dove apre.. loro....tata sicuro' and with mathematical calculations (verso); black chalk, pen and brown ink, watercolour, watermark man with a flag in a crowned cartouche 419 x 403 mm.