Ancient Celtic people, about 5000 years ago.
Newgrange.
Newgrange - song - was created in 1983.
The Megalithic European was created on 2004-10-18.
Megalithic Symphony was created on 2011-03-15.
Ireland's manmade features are Newgrange Carrowmore Megalithic Cemetery, Round Towers, and High crosses. Leviathan and Simon and Goliath. The book of Kells is also a manmade feature.
Newgrange is a prehistoric Celtic burial site in Co. Meath.
UNESCO has designated Newgrange as a World Heritage Site.
The Megalithic European has 496 pages.
Megalithic Architecture.
It is difficult to say what is the most famous part. There are many famous places in Ireland, such as the megalithic tomb in Newgrange, Trinity College, The Burren, Blarney Castle, The Giants Causeway, Glendalough and many, many others. Different people will have heard of different ones.
Megalithic is not a period of prehistory. The Megalithic period refers to a specific type of construction using large stones, typically involving structures like dolmens and stone circles.
The ISBN of The Megalithic European is 0-00-713802-4.