Ireland's indigenous system of law dates from the Iron Age. Known as
Brehon law, it developed from customs which had been passed on orally from one generation to the next. Brehon law was administered by Brehons. They were similar to judges, though their role was closer to that of arbitrators. Their task was to preserve and interpret the law. In the history of the
Kingdom of Dublin, the Gaelic Irish recaptured the city from the Norse Vikings after the
Battle of Tara. Dublin was officially founded in 988 when the Norse
King Glúniairn first recognised
Máel Sechnaill mac Domnaill as the High King of Ireland, he also agreed to pay taxes and accept
Brehon law. A
Megalithic site exists in
Rathfarnham, County Dublin, known as
Brehon's Chair or Druid's Table. It is believed to be the seat of judgment in prehistoric times, a king of outdoors court. The brehons of ancient Ireland were wise individuals who memorised and applied the laws to settle disputes among members of an extended family. Some brehons were attached to clans, and were allotted a portion of land for their support. Others lived independently by their profession. They were recognised as a professional class apart from druids and
bards, and became, by custom, to a large extent hereditary. The term "bard" is associated with a Brehon family of poets, called
Mac an Bháird (Son of the Bard). They were one of the descendants of the ancient tribes of
Soghain in the Kingdom of
Uí Maine. In ancient Ireland, Brehons, as part of the leading members of society, would take part in an event which took place every three years on
Samhain known as Feis Teamhrach (Festival of Tara) in the House of the Banquets (Teach Moidhchuarta) at
the Hill of Tara. The assembly was also originally referred to as an
Aonach in prehistoric times. It was a national event with the purpose of resolving any regional disputes regarding title to rank, property and privilege. They would be settled by the Brehons, and all annals and records would be carefully noted and entered by the
Ard Ollams in the official records. The event was founded in a very early period, and lasted until 560 AD when the final assembly was held by
King Dermot, son of Fergus. The preparatory course of study extended over some twenty years. The Brehon laws were originally composed in poetic verse to aid memorisation. Brehons were liable for damages if their rulings were incorrect, illegal or unjust. When one brehon had adjudicated on a matter submitted to him, there could be no appeal to another Brehon of the same rank; but there might be an appeal to a higher court, provided the appellant gave security. One of the main responsibilities of a Brehon was to record the genealogies of the people. Amongst notable Brehons associated with recording genealogies was the
Clan Mac Fhirbhisigh.
Dubhaltach Mac Fhirbhisigh produced
Leabhar na nGenealach, also the abridgment version
Cuimre na nGenealach and
Great Book of Lecan. The genealogist would also be referred to in old Irish as a
Seanchaidhe. The basic family unit under brehon law in ancient Ireland was defined as
Derbfine, or "True Kin" in English Another Brehon family noted for recording genealogies were the
Ó Cléirigh, such as
Mícheál Ó Cléirigh, the author of the
Annals of the Four Masters. ==The ancient tree laws ()==