Viking migration left a lasting legacy on Ireland`s population
(PHYSorg.com Archaeology & Fossils)

The early medieval period in Ireland (400-1200AD) was a time of key importance. It was a turning point in European history and the origin of much contemporary Irish culture and identity. Ireland, the early medieval `land of saints and scholars,` had much cultural and economic growth during the 5th and 6th centuries. Elsewhere in Europe there were unstable populations in the wake of the fall of Rome.