The one at Ballinvarrig in County Cork is no exception: a subrectangular block of stone rising just over a metre from the ground, planted in pasture on a south-facing slope, its long axis running east to west and its profile narrowing gradually towards the top. It is, by any measure, an unassuming object. What makes it quietly compelling is precisely that quality of understatement, a prehistoric marker doing nothing more or less than standing in a field, as it has done for millennia, with no monument around it and no interpretive board to explain it away.

Standing stones of this kind are among the most difficult monuments to date or assign a purpose to. They appear throughout Ireland and Britain from the Neolithic period onward, with the greatest concentration of erections probably falling somewhere in the Bronze Age, roughly between 2500 and 500 BC. Their functions remain genuinely uncertain; proposals range from territorial markers and route indicators to memorials for the dead or focal points for ritual activity. The Ballinvarrig stone, measuring 0.5 metres by 0.2 metres in section and just over a metre tall, is modest even within this category, but its deliberate east-west orientation suggests something more considered than accident or convenience. Whether that alignment carried astronomical, ceremonial, or purely practical significance is a question the stone itself declines to answer.