Early Pictish religion is presumed to have resembled Celtic polytheism in general, although only place names remain from the pre-Christian era. When the Pictish elite converted to Christianity is uncertain, but traditions place Saint Palladius in Pictland after he left Ireland, and link Abernethy with Saint Brigid of Kildare. Saint Patrick refers to "apostate Picts", while the poem "Y Gododdin" does not remark on the Picts as pagans. Bede wrote that Saint Ninian (confused by some with Saint Finnian of Moville, who died c. 589), had converted the southern Picts. Recent archaeological work at Portmahomack places the foundation of the monastery there, an area once assumed to be among the last converted, in the late 6th century. This is contemporary with Bridei mac Maelchon and Columba, but the process of establishing Christianity throughout Pictland will have extended over a much longer period.