Columbia subject headings:
Barracks--Italy--Naples.
Military architecture--Italy--Kingdom of the Two Sicilies.
Military architecture--Italy--Naples.
Harvard subject headings:
Barracks--Design and construction.
Kingdom of the Two Sicilies--History--1816-1861
Military architecture--Italy--Kingdom of the Two Sicilies.
Military architecture--Italy--Naples (Kingdom)
Naples (Kingdom)--History--1735-1816.
Princeton subject headings:
Barracks--Design and construction.
Kingdom of the Two Sicilies--History--1816-1861.
Military architecture--Italy--Kingdom of the Two Sicilies.
Military architecture--Italy--Naples (Kingdom).
Naples (Kingdom)--History--1735-1816.