Enclosure (archaeology) in the context of "Royal sites of Ireland"

A causewayed enclosure is a type of large prehistoric earthwork common to the early Neolithic in Europe. It is an enclosure marked out by ditches and banks, with a number of causeways crossing the ditches. More than 100 examples are recorded in France and 70 in Southern England and Wales, while further sites are known in Scandinavia, Belgium, Germany, Italy, Ireland and Slovakia.

The term "causewayed enclosure" is now preferred to the older term, causewayed camp, as it has been demonstrated that the sites did not necessarily serve as occupation sites.

Brú na Bóinne (Irish: [ˈbˠɾˠuː n̪ˠə ˈbˠoːn̠ʲə], "mansion or palace of the Boyne"), also called the Boyne Valley tombs, is an ancient monument complex and ritual landscape in County Meath, Ireland, located in a bend of the River Boyne. It is one of the world's most important Neolithic landscapes, comprising at least ninety monuments including passage tombs, burial mounds, standing stones and enclosures. The site is dominated by the passage tombs of Newgrange (Sí an Bhrú), Knowth (Cnogbha) and Dowth (Dubhadh), built during the 32nd century BC. Together these have the largest assemblage of megalithic art in Europe. The associated archaeological culture is called the "Boyne culture".

Brú na Bóinne is also an important archaeoastronomical site; several of the passage tombs are aligned with the winter solstice and equinoxes. The area continued to be a site of ritual and ceremonial activity in the later Bronze Age and Iron Age. In Irish mythology, the tombs are said to be portals to the Otherworld and dwellings of the deities, particularly The Dagda and his son Aengus. They began to be studied by antiquarians in the 18th century, and archaeological excavations began in the 20th century, when some of the passage tombs underwent restoration.

The Hill of Tara (Irish: Teamhair or Cnoc na Teamhrach) is a hill and ancient ceremonial and burial site near Skryne in County Meath, Ireland. Tradition identifies the hill as the inauguration place and seat of the High Kings of Ireland; it also appears in Irish mythology. Tara consists of numerous monuments and earthworks—dating from the Neolithic to the Iron Age—including a passage tomb (the "Mound of the Hostages"), burial mounds, round enclosures, a standing stone (believed to be the Lia Fáil or "Stone of Destiny"), and a ceremonial avenue. There is also a church and graveyard on the hill. Tara forms part of a larger ancient landscape and Tara itself is a protected national monument under the care of the Office of Public Works, an agency of the Irish Government.