Court tombs are among the oldest megalithic monuments in Ireland, built by Neolithic farming communities roughly five to six thousand years ago. Their defining feature is a semicircular or full-oval forecourt of upright stones opening onto one or more roofed burial chambers. These were not simply graves; the open court is thought to have served as a space for communal ritual, perhaps involving the bones of ancestors over many generations.

Court tombs are concentrated heavily in the northern half of Ireland, and Mayo has a notable share of them, scattered across its bogs, hillsides, and coastal margins. The townland name Carrownlacka derives from the Irish, with "carrow" typically indicating a quarter-land, a unit of land division with roots in the Gaelic territorial system. Beyond its location and monument type, the specific history of this particular tomb, including any excavation history, its current condition, or the details of its construction, remains unavailable in open sources at this time.