Columbia subject headings:
Calendar art--Conservation and restoration--Pictorial works.
Calendars--Rome--Early works to 1800.
Chronology, Roman--History.
Philocalus, Furius Dionysius, active 4th century--Manuscripts--Conservation and restoration.
Polemius, Silvius, active 440?--Manuscripts--Conservation and restoration.
Rome--History--Sources.
Harvard subject headings:
Calendar, Roman
Calendar, Roman--Early works to 1800.
Philocalus, Furius Dionysius, active 4th century
Rome--History--Sources.
Silvius, Polemius.
Princeton subject headings: