The Dalcassians are a Gaelic Irish clan, generally accepted by contemporary scholarship as being a branch of the Déisi Muman, that became very powerful in Ireland during the 10th century. Their genealogies claimed descent from Tál Cas. Their known ancestors are the subject of The Expulsion of the Déisi tale and one branch of their blood-line went on to rule the petty kingdom of Dyfed in Wales during the 4th century; probably in alliance with the Roman Emperor Magnus Maximus.
Aerial view of the River Shannon, the area where the Dál gCais grew in power
Brian Bóruma, High King of Ireland, perhaps the best-known historical figure of the Dál gCais
Tomb effigy of the King of Thomond, Conor Roe Ua Briain, in Corcomroe Abbey, where he was buried by the monks after he and his men were killed by Conor Carrach O'Loughlin
Image: Conor O'Brien Tomb Effigy Photo 2
The Gaels are an ethnolinguistic group native to Ireland, Scotland and the Isle of Man. They are associated with the Gaelic languages: a branch of the Celtic languages comprising Irish, Manx and Scottish Gaelic.
The Emigrants, painting from 1844. This depicts a Highland Scots family in Gaelic dress migrating to New Zealand.
Scota and Goídel Glas voyaging from Egypt. From the 15th century chronicle the Scotichronicon.
The Lia Fáil at the Hill of Tara, sacred site of inauguration for the Gaelic High Kings.
A page from the 9th century Book of Kells, one of the finest examples of Insular art. It is believed to have been made in Gaelic monasteries in Ireland and Scotland.