Built in 1124, by the
King of Connacht,
Tairrdelbach Ua Conchobair, known as
Caislen Dún Gaillimhe ('the Castle of Fort Galway'). The contemporary
Annals of Tigernach state "caistél Gaillme & Caistél Cul Maile & Castél Duin Leodha" were built by the men of Connacht, while
Chronicon Scotorum states "Tri casitle la Connacht .i. caislen Duin Gaillme et Dun Leoda & Cul Maile." The loanword caistél was "undoubtedly used to signify their resemblance to the numerous [earth and timber]
motte-and-baily castles of England and France that still outnumbered stone keeps in the early twelfth century." The caistél at or within Dún Gaillimhe and those elsewhere in Connacht were sophisticated native innovations, massive stone fortifications, probably decked with timer, "a fusion of the native rath, crannog, and in particular, the cashel traditions." These were the first buildings in
Éire deemed worth of being called castles, decades before the Norman invasion. And Caistél Gaillme was perhaps the very first. ... The family Tairrdelbach installed as its constables were among his admirals, so it appears the caistél or dún was one of the kingdom's naval bases. (Martyn, 2016, p. 33, 34) ==Gaelic Galway==