No wall stump, no scatter of dressed stone, no worn threshold. The site exists now almost entirely as a bibliographic entry, recorded by a researcher named Bowman in 1934, who noted the presence of an early church site within the enclosure of a ringfort, the kind of circular earthen or stone boundary that early medieval communities used to define and protect a farmstead or settlement. That pairing of church and ringfort was not unusual in early medieval Ireland, where sacred and domestic space often overlapped, but what makes Killowen quietly striking is the totality of its disappearance.

Bowman's 1934 reference gives the site its only real anchor in documented history. A ringfort, sometimes called a rath, typically survives as a low earthen bank and ditch, faintly legible in the landscape even after centuries of ploughing. When a church occupied the interior, it usually suggests a founder's enclosure or a community that grew up around an early monastic or pastoral presence. Whether any trace of the ringfort itself survives at Killowen is not recorded; what is certain is that no surface evidence of the church remains at all. It has been absorbed entirely, leaving a coordinate and a citation in place of any physical remnant.