He abdicated in 1030 and undertook a pilgrimage to Rome, for which reason he was known as Flaithbertach an Trostáin (Flaithbertach of the Pilgrim's staff).
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Other major churches in the region, those established as sees following the 12th century reforms, included the Columban churches of Derry and Raphoe, and the Patrician churches of Louth, Maghera and Connor.
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