Columbia subject headings:
Fortification, Renaissance--Congresses.
Military architecture--Europe--History--16th century--Congresses.
Military art and science--Europe--History--16th century--Congresses.
Harvard subject headings:
Fortification, Renaissance--Congresses.
Military architecture--Europe--History--16th century--Congresses.
Princeton subject headings:
Fortification--Europe--History--16th century--Congresses.
Military architecture--Europe--History--16th century--Congresses.
Military art and science--Euroope--History--16th century--Congresses.