A fragment of a medieval grave-slab, the kind of carved stone marker that once identified the resting place of a named individual or a religious community, was recovered at Balgriffin Park and is now held in the National Museum of Ireland. Its accession number, NMI 1958:60, places its arrival in the museum's collection in 1958, which means the fragment had already been separated from whatever context it once occupied before most living visitors to the park were born.

Grave-slabs of this type are among the more personal survivals from medieval Irish religious life. Unlike the great high crosses or the architectural remains of abbeys, a grave-slab was made for a specific person or a specific place of burial, often incised with a cross, interlace decoration, or an inscription. Their presence at a site frequently indicates an earlier ecclesiastical use of the ground, a church, a burial ground, or a monastic enclosure that has since vanished from the visible landscape. The fragment from Balgriffin carries the site record reference DU018-159----, placing it within the Archaeological Survey of Ireland's inventory for County Dublin. The record was compiled by Geraldine Stout and uploaded in August 2011.

The slab itself is not at the park; it is in the National Museum's collection, so a visit to Balgriffin Park will not bring you face to face with carved stone. What you encounter instead is the quieter puzzle of a place where something significant once happened and left almost no trace above ground. The park sits in the Balgriffin area of north Dublin, and while the landscape offers little outward sign of its earlier history, knowing that a grave-slab fragment was lifted from this ground is enough to make you look at the surface differently. If medieval ecclesiastical archaeology interests you, the National Museum in Kildare Street holds the object itself, catalogued and accessible through the museum's collections.