1156 in Ireland

Incumbents

• High King: Toirdelbach Ua Conchobair then Muirchertach Mac Lochlainn

Events

• Ruaidrí Ua Conchobair becomes King of Connacht
• Great freeze of winter.

Deaths

• Tairrdelbach Ua Conchobair, who had reigned as King of Connacht since 1106 and was a claimant to the High Kingship of Ireland. He was buried in Clonmacnoise.