10th century in Ireland
events from the 10th century in Ireland

Events from the 10th century in Ireland.
900s
900
Death of Tadg mac Conchobair, King of Connacht
Death of Litan, abbot of Tuam
902
Dublin has been abandoned - the end of the Longphort phase - the term used by modern scholars to refer to the earliest period of Viking settlement at Dublin
904
Mughroin mac Sochlachan, 30th King of Uí Maine, died.
908
13 September - Flann Sinna slew Cormac mac Cuilennáin, the king-bishop of Cashel and King of Munster, at the battle of Belach Mughna, in Leinster.
909
Death of Sochlachan mac Diarmata, 31st King of Uí Maine.
Death of Cerball mac Muirecáin, King of Leinster
910s
911
Drogheda is established as a Viking settlement on the River Boyne.
911 or 914
A large Viking fleet arrives in Waterford and a second period of Viking raids begins. The Vikings also established a base in Waterford.
916
25 May: death of Flann Sinna (b 847 or 848), the son of Máel Sechnaill mac Máele Ruanaid of Clann Cholmáin, a branch of the southern Uí Néill. He was King of Mide from 877 onwards, following Donnchad mac Eochocain, and is counted as a High King of Ireland
Death of Mór ingen Cearbhaill, Queen of Laigin.
917
The Annals of Ulster records the arrival of two Viking fleets in Ireland in 917, one led by Ragnall and the other by Sigtrygg, both of the Uí Ímair kindred.
“10th century in Ireland” enters the record as events from the 10th century in Ireland. Crown Archives preserves that source wording while asking what 10th, century and Ireland can confirm, complicate or overturn.
Why this record matters
“10th century in Ireland” is worth following because a concise public description often conceals a longer documentary argument. Here, 10th, century and Ireland provides the most credible route into that argument.
The citation trail is more important than the brevity of the summary: it shows where individual claims can be examined in context. The source revision retrieved here is dated Feb 5, 2025. The linked authority identifier is Q4547203. None of the 0 selected statements returned an explicit reference.
The absence of detail may reflect summary conventions rather than a lack of surviving documentation. The source lead contains qualifying language; that uncertainty should survive quotation, summary and reuse. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Use the entry as an orientation point, then follow its citations and revision history. Names, dates and institutional relationships should be checked against the original record.
- Subject orientation
- Search vocabulary
- Locating named sources
The closest primary source, responsible institution and strongest cited specialist reference.
Three-step research path
- Establish the record: confirm the title “10th century in Ireland”, its source revision and the description used here.
- Expand the search: follow 10th century in Ireland primary sources, 10th century in Ireland archive and 10th research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
- Which source most directly establishes the central claim about “10th century in Ireland”?
- Which cited source is closest to the event, object or claim?
- Which institution is responsible for the underlying evidence?
Search terms from this dossier
This entry incorporates text from “10th century in Ireland” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.