A crannog is an artificial or partially artificial island, typically built from timber, peat, brush, and stone, and used as a defended dwelling from the Bronze Age through to the early modern period. They are found across Ireland and Scotland, and the fact that so many were built in open lakes or boggy margins speaks to just how much early Irish communities valued the security of water as a boundary. This particular example has attracted a map reference and a monument classification, but very little else has made it into the accessible record so far.