sentences:  From this golden age in Ireland of learning and art (5th – 9th Centuries) comes one of Ireland's greatest artifacts, The Ardagh Chalice, a masterpiece of metalwork, which was found in a west Limerick fort in 1868.It is believed that the chalice had been taken by raiding Danes during the 9th century, ending up in the territory of their Irish allies, the O'Donovans of the Ui Fidgenti.Following the establishment of the Ui Fidgenti circa 377 a.d., there were few significant changes in political control until the arrival of the Vikings in the 9th century, which ultimately brought about the establishment of the city on an island on the River Shannon in 922.