Declan founded a seminar in Ardmore in County Waterford circa.
416 AD.
The holy well served as a baptistery to the primitive Christian missionaries that worked and spread the Christian word throughout the region.
Declan retired for greater seclusion to a little cell he had made himself at the spot where is now the ruin church beside the holy well.
There is no uniform date for this church; the western section is the earlier construction whereas parts of the eastern end show signs of 14th century work.
