Portal tombs are the least researched megalithic class in Ireland, despite the fact that they have one of the widest distributions of all tomb classes. This study sets out to present a critical synthesis of the previous work on portal tombs and to investigate the chronology, morphology and landscape setting of this enigmatic tomb class. It concerns itself with all portal tombs, in Ireland, Wales and Cornwall. Chapter 1 defines the research methods and the main research questions and aims. Chapters 2 and 3 present the history of research in two parts. All excavations, antiquarian explorations,...