The window sits within an elliptical-headed embrasure, and the wall itself is pocked with putlog holes, the small sockets left when builders removed the timber scaffolding poles used during original construction. An early photograph shows the belfry once standing considerably taller and intact, which gives some sense of how much has been lost. The graveyard enclosing these remains is rectangular, bounded by earthen banks to the east and south, and the whole site sits level with the surrounding landscape, sharing its northern boundary with the Roman Catholic church of St. Rhanus.

The dedication here is to St. Rane, observed on the 15th of April, and the saint in question is Ruadhán of Lorrha in County Tipperary, who died in AD 584. He came from aristocratic stock, connected through the Uí Dhuach to the Eoghanacht kings of Munster, and was educated by the influential St. Finnian of Clonard. Ruadhán went on to found churches across Ireland, though Kilrane does not appear to be among his own foundations; the dedication seems to reflect the spread of his cult rather than his direct presence. A Life of the saint was probably composed somewhere between AD 750 and 800, though scholars have noted signs of a later 12th-century reworking, with connections to Augustinian canon houses woven into the text. By 1615, when Thomas Ram, the Protestant bishop of Ferns, conducted a formal visitation of the diocese, the vicar was one Richard Turner and both the church and chancel were recorded as being in repair. What happened between that visitation and the near-total collapse of the building is not recorded, but the solitary gable is all that now survives of what was evidently a substantial parish church.