When compiling genealogy information, the rule is to use the place name that
was in effect on the day of the event. This raises some questions on my
ancestral town of Castelcivita. Was it in Principato Citeriore when it was in
Kingdom of Naples? What day did it become part of Kingdom of the Two
Sicilies? What day did it become part of Kingdom of Italy? When did Province of
Principato Citeriore become Province of Salerno?