the early Christian period, with the monastery of Cell Maignenn (Cill Mhaighneann in modern Irish) established by the year 606. By 795, the ecclesiastical site, located on the ridge of land at the confluence of the Liffey and the Camac, may still have been the only substantial structure along the Liffey's banks.

The Kilmainham Brooch, a late 8th- or early 9th-century