Sexti Ivlii Frontini viri consularis De aqvedvctibvs vrbis Romae
A Latin treatise on Rome's aqueducts by Sextus Iulius Frontinus, printed in 1512 and held by the Eisenbibliothek Schlatt, a collection in which the book is preserved as a historical text on Roman engineering. The illustration is a red wax seal impression with a standing robed figure in a lozenge-shaped field surrounded by inscribed lettering, showing how a seal's rim text and central figure are arranged for a designer studying early-modern heraldic and emblematic devices.
