The building occupied by the Meteorological Office on the site of Marlborough House in north Dublin city sits, largely unnoticed, above ground that once served as a burial place, the kind of quietly absorbed archaeological fact that tends to surface only in footnotes and excavation reports.

The graves came to light in July 1914 during building or groundwork on the site. Workers uncovered somewhere between eight and ten burials, each orientated east to west, a reliable indicator of Christian funerary practice in Ireland. They were slab-lined graves, a construction method common in Early Medieval Ireland where flat stones are set on edge to form a rough stone box around the body, offering a degree of protection without the expense of a cut stone tomb. The date assigned to them is broadly Early Medieval, meaning they likely belong to the period roughly between the fifth and twelfth centuries, though no tighter dating appears to have been established. Among the remains, a bone implement was recovered, an object noted by archaeologists Mary Cahill and Melanie Sikora in their 2011 publication. What the implement was used for, and by whom, is not recorded in the available sources.

There is nothing to mark this place for a visitor today. The Meteorological Office building stands on the site, and the graves themselves were uncovered over a century ago under circumstances that, by modern standards, would have involved considerably more documentation. The significance of the find lies less in spectacle and more in what it suggests about the longer occupation of Dublin's northside, where Christian communities were burying their dead long before the city took its familiar medieval shape. If you find yourself on Glasnevin Road or the surrounding streets, the site rewards a moment's thought, even if the surface gives nothing away.