The court cairn or court tomb is a megalithic type of chambered cairn or gallery grave. During the period, 3900–3500 BC, more than 390 court cairns were built in Ireland and over 100 in southwest Scotland. The Neolithic (New Stone Age) monuments are identified by an uncovered courtyard connected to one or more roofed and partitioned burial chambers. Many monuments were built in multiple phases in both Ireland and Scotland and later re-used in the Early Bronze Age.