Senchus Mor

a collection of ancient Irish laws. Compiled in the fifth century, the Senchus Mor is a record of the customary law of the ancient Irish. The oldest extant copy dates from the 14th century. Embracing all branches of law, including procedural, property, and family law, the collection reflects the process whereby clan relations in ancient Irish society were broken down and feudalization began. The Senchus Mor is the main source for information on the early history of Ireland.