The pan-Wales Early Medieval Ecclesiastical Sites Project was concerned with trying to identify ecclesiastical sites which predate the Norman Conquest. GGAT's part of the project was spread across two years, 2002-03 and 2003-04.
Year 1 of the project was a desktop survey of material from a variety of sources which was assembled to produce lists of sites graded Grade A (certain), Grade B (probable), Grade C (possible) and Grade D (insufficient information to determine grade).