Ó Cléirigh reports that his ultimate source was an "old book" (seinleabhar), but his direct exemplar was a manuscript dated 1582, in the possession of Eochaidh Ui Ifernain (Eochy O'Heffernan).[10] The Lives also relates that the saint later paid a visit to the Déisi of Mide/Meath, where the King of Tara welcomed him and granted him land for the purpose of founding a "monastery of canons".These bishop saints, known since the 17th century as quattuor sanctissimi episcopi, also included Ailbe of Emly, Ciarán of Saigir and Abbán of Moyarney.It has been argued that before the coming of Patrick, the south coast of Munster would have provided the most likely point of entry for the introduction of Christianity via Britain or via Gaul.The settlements of the Déisi and the Uí Liatháin in southwest Wales, as evidenced by the distribution of ogam stones, provided an important connection between Britain and Ireland.By promoting the cult of the saint, which entailed that Patrick was propagated as the apostle and first bishop of the Irish, it sought to establish and control a network of religious houses throughout the country.[17] The Lives of Ailbe, Declán, Ciarán and Abbán in the Dublin Collection appear to reflect the need of the Munster houses to offer some counterweight against the Patrician dossier promoted by Armagh, even though they do not deny the national importance of Saint Patrick.Historian Richard Sharpe proposed the earlier Life of Ailbe in the Codex Salmanticensis was originally composed in the eighth century to further the cause of the Éoganacht church of Emly.[12] Dagmar Ó Riain-Raedel has argued that this way of promoting Munster saints was anticipated in texts emanating from the Schottenklöster or Irish Benedictine monasteries of southern Germany, whose principal house was at Regensburg.Ó Riain-Raedel connects this to the establishment of Cashel as an archiepiscopal seat in 1111, because it was Ailbe, being the patron saint of the nearby foundation of Emly, who played a key role in advertising its new status.
Round Tower at Ardmore
Memorial stone in Ardmore
St Declan's Stone on Ardmore beach; supposedly, it carried his bell to Ireland.
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