As a nation state, Italy has emerged only in 1871. Until then the country was politically divided into a large number of independant cities, provinces and islands. The currently available evidences point out to a dominant Etruscan, Greek and Roman cultural influence on today's Italians.
I can only guess that some Irish came to Italy for the same reason that tens of thousands (?) came to the US - because of the diseased potato crops and the famine which ensued.
Giovanni Caboto, son of Giulio, was born in Gaeta, Italy, around 1451 AD. After the Aragonese defeated the Angevins in 1461, his family took refuge in Venice where the young Giovanni grew up, got married to Mattea about 1870 and had three children: Ludovico, Sebastiano, and Sancto. His dream was to ...