Mysterious carvings on an ancient rock

The Clonfinlough Stone lies in a field near Clonlough in County Offaly. It has mysterious carvings that may date as far back as 1000 BC or they might possibly date to 1400AD. The stone is 10 feet x 8 feet and is completely covered with rock art carvings including cup marks, a Greek letter, a cross, and even a footprint. It was always believed to date from the Bronze Age as a nearby Bronze Age settlement has been found but a recent discovery noticed similarities between the carvings and those found on rocks in Galicia in Northern Spain. A new theory is that this stone was on the medieval pilgrimage route between the nearby Monastery of Clonmacnoise and Santiago de Compostella. It was probably a stopping point for traveling pilgrims and the carvings may, therefore, be Christian and date from the mid-1400 ′s.