Columbia subject headings:
Harvard subject headings:
Fortification--Holy Roman Empire.
Military architecture--Italy--History--16th century.
Military engineering--Holy Roman Empire.
Military engineers--Holy Roman Empire.
Olgiati, Gianmaria, approximately 1494-1557.
Princeton subject headings:
Fortification--Italy.
Military engineering--Italy.
Military engineers--Italy.
Olgiati, Gianmaria, approximately 1494-1557.