This is a display of the
main area around Piazza Plebiscito, the Royal Palace, Piazza
Municipio and the old fortress known as Maschio Angioino. The
items are identified in the key in the boxes on the map. The
individual letter/number tags circled in yellow in the main body
of the map are "live"—
thas is, if you click on one, you will link to a relevant article
about that site.