Carrowmore (, 'the great quarter') is a large group of megalithic monuments on the Coolera Peninsula to the west of Sligo, Ireland. They were built in the 4th millennium BC, during the Neolithic (New Stone Age). There are thirty surviving tombs, making Carrowmore one of the largest clusters of megalithic tombs in Ireland, and one of the 'big four' along with Carrowkeel, Loughcrew and Brú na Bóinne. Carrowmore is the heart of an ancient ritual landscape which is dominated by the mountain of Knocknarea to the west. It is a protected National Monument. Location Placed on a small plateau at an altitude of between 36.5 and 59 metres above sea level Carrowmore is the focal point of a prehistoric ritual landscape which is dominated by the mountain of Knocknarea to the west with the great cairn of Miosgán Médhbh on top. To the east, in Carns townland, two large cairns overlook Lough Gill, and along the eastern boundary of the peninsula the Ballygawley Mountains have four passage tombs at their peaks. Description Thirty monuments survive in Carrowmore today. There may have been more monuments in the complex originally, but some fell victim to quarrying and field clearance during the 18th, 19th and early 20th centuries. The complex is about one kilometre north-south and 600 metres east-west. Most of the sites are "satellite tombs" which surround the largest monument, placed on the high point of the plateau, the cairn (now restored) called Listoghil. Because of the clustering of the monuments, certain morphological features presented by the tombs, and the assemblage of material found within some of the monuments, Carrowmore – like Newgrange, Loughcrew and Carrowkeel – is classified by archaeologists as being part of the Irish Passage Tomb Tradition. However, in some respects the Carrowmore sites are atypical passage tombs. For example, none of the tombs have lintel-covered, tunnel-like, passages that are a feature of most Irish passage tombs, and only one site (Tomb 51, Listoghil) possesses a cairn. Satellite tombs The monuments (in their original state) consisted of a central dolmen-like megalith with 5 upright orthostats bearing a roughly conical capstone on top, enclosing a small pentagonal burial chamber. These were each enclosed by a boulder circle of 12 to 15 metres in diameter. The boulder circles contain 30 to 40 boulders, usually of gneiss, the material of choice for the tombs. Sometimes a second, inner boulder circle is also