Events from the 6th century in Ireland.
- 506
- 507
- 509
- 3 September - Death of St. Mac Nisi, Bishop of Connor (according to some sources; see 507 above).[1][2]
- 512
- 513
- 2 November - Death of Bishop Erc of Slane (according to some sources; see 512 above).[1][2]
- 515
- 516
- 517–518
- 6 July - Death of St. Moninne (Darercae) at the convent she established at Killeavy (year varies according to sources).
- 520
- 521
- 522
- 523
- St. Ninnidh made the island of Inishmacsaint (island of plain Sorrell) in Lough Erne his headquarters around 523.
- 523–526
- 527
- 527–528
- 12 September or 30 December - Death of Bishop Ailbe of Emly (year varies according to sources; also given as 534 or 542).[1][2]
- 530
- 531 (or 537)
- 534
- 12 September or 30 December - Death of Bishop Ailbe of Emly (year varies according to sources; also given as 527, 528 or 542).[1][2]
- 535
- 536
- 537
- 538
- 539
- 540
- 542
- 12 September or 30 December - Death of Bishop Ailbe of Emly (year varies according to sources; also given as 527, 528 or 534).[1][2]
- 545
- 546
- 549
- 584
- The foundation of the University of Tuaim Drecain (Tomregan) by the Synod of Drumceat on Magh Slécht.
- 585
- 588
- 590
- Columbanus and twelve companions set sail for France.
- 593
- 595
- 597
- 598
- 599–600
Moody, T. W.; Martin, F. X.; Byrne, F. J., eds. (1989). A New History of Ireland. 8: A Chronology of Irish History. A Companion to Irish History, part I. Oxford University Press. ISBN 978-0-19-821744-2.
Gratton-Flood, W. H. (1907), "The Twelve Apostles of Erin", The Catholic Encyclopedia, vol. I, New York: Robert Appleton Company, retrieved 2008-02-09
Mac Annaidh, Séamas, ed. (2001). Illustrated Dictionary of Irish History. Dublin: Gill and Macmillan. ISBN 0717135365.
McCarthy, Daniel P. (1998). The Chronology of the Irish Annals. Proceedings of the Royal Irish Academy, Section C, Archaeology, Celtic studies, history, linguistics, and literature, 98(6). Dublin: Royal Irish Academy.
Duffy, Seán (2005). The Concise History of Ireland. Dublin: Gill & Macmillan. ISBN 9780717138104.
Moody, T. W.; Martin, F. X., eds. (1967). The Course of Irish History. Cork: Mercier Press. p. 60.
The Laud Synchronisms and Book of Leinster give him a reign of 18 years.