The shaft is long gone, but the base remains, and it is old enough to predate almost everything built around it. What looks at first like an anonymous lump of stone is almost certainly a remnant of the Early Christian period, a span of Irish history roughly from the fifth to the twelfth centuries when small monastic and ecclesiastical communities left their marks across the landscape in carved stone, enclosures, and simple grave markers. This one survives beside a fragment of old wall, two orphaned pieces of a much earlier arrangement.

The cross-base is described as being of probable Early Christian date, which places its origins somewhere in that formative period of Irish Christianity, before the upheavals of the Viking age and the later Norman reorganisation of church life. Granite was a practical and durable choice in this part of County Dublin, where the stone is locally available from the hills to the south. Cross-bases of this type were designed to hold standing stone crosses upright, the mortised socket receiving the tenon at the foot of the shaft. The cross itself, whatever form it took, has not survived, lost to time, reuse, or simple breakage. What is notable is that the base is still in situ, or at least in a plausible location within a graveyard that likely occupies ground with a long history of religious use.

Donnybrook graveyard is not difficult to find, sitting within the village itself rather than on some remote hillside. The cross-base stands in the middle of the burial ground rather than at its margins, which makes it relatively easy to locate once you are inside. It is worth pausing beside the wall fragment as well, since the two elements together hint at a more substantial early structure now otherwise vanished. There is no particular season that makes the visit more rewarding, though the low light of winter or early spring, when vegetation has died back, can make stonework easier to examine. The socket in the top of the base, if visible, is the detail that most clearly explains the object's original function.