Early Christian monks in Ireland carved stone crosses between A.D. 500-800. The earliest crosses were simple stone slabs, but later crosses had arms and decorative circles. Examples discussed include the Duvillaun Slab with designs on both sides, one being a Greek cross and the other a crude crucifixion scene. The Fahan Mura Slab further developed the form with a raised Greek cross and interwoven strapwork decoration. High crosses from the 7th-9th century had intricate carvings, including the North and South Crosses of Ahenny with rope-like motifs and the Moone Cross depicting bible stories.