Máel Muire Ó Lachtáin was Dean of Tuam from 1230 and then the fourth Archbishop of Tuam from 1235 to 1249. ''The History of the Popes'' describes him as:

'' Dean of Tuam, having been elected by the Chapter, was accepted by the Pope, and afterward received confirmation from the King ( Henry III of England). The Four Masters seem to intimate that he was
consecrated Consecration is the solemn dedication to a special purpose or service. The word ''consecration'' literally means "association with the sacred". Persons, places, or things can be consecrated, and the term is used in various ways by different grou ...
in England. He is said to have been an eminent canonist ... He undertook a pilgrimage to Jerusalem and wrote an account of it. ... He died at the town of
Athlone Athlone (; ) is a town on the border of County Roscommon and County Westmeath, Ireland. It is located on the River Shannon near the southern shore of Lough Ree. It is the second most populous town in the Midlands Region with a population of ...
, about Christmas, in the year 1249.''

References

* https://archive.org/stream/fastiecclesiaehi04cottuoft#page/n33/mode/2up
Annals of the Four Masters at CELT
* https://archive.org/stream/fastiecclesiaehi04cottuoft#page/n17/mode/2up Archbishops of Tuam Medieval Gaels from Ireland Pilgrimage accounts Medieval Irish writers Christian clergy from County Galway 13th-century Roman Catholic archbishops in Ireland 1249 deaths Deans of Tuam 13th-century writers Year of birth unknown Irish expatriates in England {{Ireland-RC-bishop-stub