This ancient cross-slab, carved from local stone, measures 64 centimetres in height and 12 centimetres wide at its base. Time and the elements have taken their toll on this early Christian monument; the southern arm has broken away completely, leaving only three arms of the cross intact. The monument is oriented along a north-south axis, following a tradition common to many early Irish ecclesiastical sites.

The cross represents a style of monument that proliferated across Ireland during the early medieval period, when Christianity was establishing itself throughout the island. These simple stone crosses, often erected at religious sites or along pilgrimage routes, served as markers of sacred space and focal points for prayer. Unlike the elaborate high crosses found at major monasteries, this modest example at Drumnasillagh speaks to the grassroots nature of early Irish Christianity, where local communities erected their own monuments using available materials and local craftsmanship.

Today, the cross stands as a tangible link to Donegal’s medieval past, its eroded surface telling a story of endurance through centuries of Atlantic weather. Though damaged and worn, it remains an important piece of the archaeological landscape, documented in the comprehensive Archaeological Survey of County Donegal compiled in 1983. Such monuments, whilst easily overlooked, form part of a broader network of early Christian sites that help archaeologists and historians understand how Christianity spread through rural Ireland and how local communities expressed their faith in stone.