According to an Irish
dinsenchas ("place-lore") poem in the 12th century
Book of Leinster, Crom Cruach's
cult image, consisting of a gold figure surrounded by twelve stone figures, stood on
Magh Slécht ("the plain of prostration") (pronounced Moy Shlokht) in
County Cavan, and was propitiated with first-born sacrifice in exchange for good yields of milk and grain. Crom Cruach is described as a wizened god, hidden by mists, and is said to have been worshipped since the time of
Érimón. An early
High King,
Tigernmas, along with three quarters of his army, is said to have died while worshipping Crom on
Samhain eve, but worship continued until the cult image was destroyed by St. Patrick with a
sledgehammer. This incident figures prominently in medieval legends about St. Patrick, although it does not appear in his own writings, nor in the two 7th century biographies by
Muirchu and
Tírechán. However
J.B. Bury, infers that there is a missing passage in Tírechán about Crom Cruaich;
Ludwig Bieler, who edited the two biographies,
Jocelin's 12th century
Life and Acts of St. Patrick tells much the same story. Here the god is called Cenncroithi, interpreted as "the head of all gods", and when his image falls the silver and gold covering it crumble to dust, with the imprint of the crozier left on bare stone. == Archaeology ==