Drogheda North Lighthouse, Mornington, Co. Meath

Yet that is precisely the arrangement at Drogheda North Lighthouse, where the glazed lantern room sits well clear of the ground, encircled by its own gangway rather than tucked into a conventional tower. The effect is more industrial scaffold than romantic beacon, and that is rather the point: this is a working piece of maritime infrastructure, built to be serviced and maintained by keepers who had to climb up to it.

The structure dates from around 1880, a period when Irish harbour authorities were investing heavily in cast iron as a material for coastal engineering; it was cheap to produce in standardised sections, quick to erect, and resistant to the battering that timber or masonry towers suffered on exposed estuary mouths. Here the lantern and its supports were bolted together on site rather than built up course by course like a traditional masonry lighthouse, which explains the somewhat skeletal, engineered look of the whole thing. The site was never just a single tower, either: a keeper's house and outbuildings stand within brick boundary walls nearby, forming a small self-contained settlement for whoever tended the light. Taken together with other lighthouses along this stretch of coast, plus the beacons and a former lifeboat house that once served the same stretch of water, the group tells the story of how a single river mouth was made navigable and safe for shipping through a whole scattered system of structures rather than one grand monument.

What survives today is notable for how much of the original fabric remains intact, from the cast-iron lantern itself down to the ladder and walkway that keepers would have used daily. It is a useful reminder that lighthouses are rarely solitary follies; they belong to networks, and Drogheda North is best understood as one node in a wider arrangement of lights, beacons, and rescue infrastructure that once guided vessels safely along this section of the Irish coast.