Monastery of Mohill-Manchan
The monastery of Mohill-Manchan (Irish: mainistir an Maothail-Manachain) was anciently located at Mohill, in county Leitrim. The earliest church was founded by Manchán of Mohill in the 6th century.
Source: Wikipedia — Monastery of Mohill-Manchan (CC BY-SA 4.0)