Cashel became a seat of Christian cult at a very early period, and there are good reasons to think that St Patrick founded a church there. The Rock of Cashel has for very many centuries been known as _Carraig Phadraig_, or Patrick's Rock. The first Christian Irishman whose writings have come down to us was Dubhthach, or, as the name would probably now be Anglicised, Duffy, Mac U Lugair. In his poem in praise of the prowess of Leinstermen, he says, that they "unyoked their horses on the ramparts of clerical Cashel." As this Duffy was a disciple of St Patrick's, and one of the first converts made by him in Ireland, we are forced to think that one of the first Christian churches ever erected in Ireland was the one erected in Cashel, as it appears to have been in existence when Duffy wrote his poem, which could hardly have been later than the middle of the sixth century. But no vestige of the church of St Patrick's time remains. It was probably a wooden building, and may have disappeared as far back as thirteen centuries ago. The oldest building on the Rock of Cashel is the round tower, not Mr Scully's incongruous edifice, but the original one, built probably in the ninth century. It is ninety feet high, and in a fairly good state of preservation. The cathedral is thought to have been built in 1169 by O'Brien, King of Munster, but there does not appear to be much of the building he erected to be seen now, for the ruined cathedral which exists cannot, from the style of its architecture, be older than the fourteenth century. We know from authentic history that one of the Fitzgeralds burned the cathedral in 1495, because he wanted to burn Archbishop Creagh, who, he thought, was in it; but it does not seem to be fully known whether the building was entirely or only partially destroyed by Fitzgerald. Divine service is said to have been celebrated in it so late as 1752, but it must have been in a semi-ruined condition even then. [Illustration: INTERIOR OF CORMAC'S CHAPEL.]