Clonmacnoise, on the banks of the River Shannon, County Offaly.
This medieval monastery was founded by St Ciaran in 545 – 548 AD.
It thrived from the 7th to the 12th centuries as a centre of scholarship and piety.
Plundered by the Vikings and the Anglo-Normans, it fell to the English in 1552.
Many of the high kings of Tara and Connacht were buried here.