Ulaid in the context of "Navan Fort"

Downpatrick (from Irish Dún Pádraig, meaning 'Patrick's fort') is a town in County Down, Northern Ireland. It is on the Lecale peninsula, about 21 mi (34 km) south of Belfast. In the Middle Ages, it was the capital of the Dál Fiatach, the main ruling dynasty of Ulaid. Its cathedral is said to be the burial place of Saint Patrick. Today, it is the county town of Down and the joint headquarters of Newry, Mourne and Down District Council.Downpatrick had a population of 11,545 according to the 2021 Census.

Irish mythology is the body of myths indigenous to the island of Ireland. It was originally passed down orally in the prehistoric era. In the early medieval era, myths were written down by Christian scribes, who Christianized them to some extent. Irish mythology is the best-preserved branch of Celtic mythology.

The myths are conventionally grouped into 'cycles'. The Mythological Cycle consists of tales and poems about the god-like Tuatha Dé Danann, who are based on Ireland's pagan deities, and other mythical races like the Fomorians. Important works in the cycle are the Lebor Gabála Érenn ("Book of Invasions"), a legendary history of Ireland, the Cath Maige Tuired ("Battle of Moytura"), and the Aided Chlainne Lir ("Children of Lir"). The Ulster Cycle consists of heroic legends relating to the Ulaid, the most important of which is the epic Táin Bó Cúailnge ("Cattle Raid of Cooley"). The Fenian Cycle focuses on the exploits of the mythical hero Finn and his warrior band the Fianna, including the lengthy Acallam na Senórach ("Tales of the Elders"). The Cycles of the Kings comprises legends about historical and semi-historical kings of Ireland (such as Buile Shuibhne, "The Madness of King Sweeny"), and tales about the origins of dynasties and peoples.

Táin Bó Cúailnge (Modern Irish pronunciation: [ˈt̪ˠaːnʲ bˠoː ˈkuəlʲɲə]; "the driving-off of the cows of Cooley"), commonly known as The Táin or less commonly as The Cattle Raid of Cooley, is an epic from Irish mythology. It is often called "the Irish Iliad", although like most other early Irish literature, the Táin is written in prosimetrum, i.e. prose with periodic additions of verse composed by the characters. The Táin tells of a war against Ulster by Queen Medb of Connacht and her husband King Ailill, who intend to steal the stud bull Donn Cuailnge. Due to a curse upon the king and warriors of Ulster, the invaders are opposed only by the young demigod, Cú Chulainn.

The Táin is traditionally set in the 1st century in a pagan heroic age, and is the central text of a group of tales known as the Ulster Cycle. It survives in three written versions or "recensions" in manuscripts of the 12th century and later, the first a compilation largely written in Old Irish, the second a more consistent work in Middle Irish, and the third an Early Modern Irish version.

Cú Chulainn (/kuːˈkʌlɪn/ koo-KHUL-in Irish: [kuːˈxʊlˠɪn̠ʲ] ), is an Irish warrior hero and demigod in the Ulster Cycle of Irish mythology, as well as in Scottish and Manx folklore. He is believed to be an incarnation of the Irish god Lugh, who is also his father. His mother is the mortal Deichtine, sister of King Conchobar mac Nessa.

Born Sétanta, he gained his better-known name as a child, after killing Culann's fierce guard dog in self-defence and offering to take its place until a replacement could be reared, hence he became the "Hound (cú) of Culann". He was trained in martial arts by Scáthach, who gave him the spear Gáe Bulg. It was prophesied that his great deeds would give him everlasting fame, but that his life would be short. At the age of seventeen he defended Ulster single-handedly against the armies of Queen Medb of Connacht in the famous Táin Bó Cúailnge ("Cattle Raid of Cooley"). He is known for his terrifying battle frenzy (ríastrad), in which he becomes an unrecognisable monster who knows neither friend nor foe. He fights from his chariot, driven by his loyal charioteer Láeg and drawn by his horses, Liath Macha and Dub Sainglend.

The Uí Dúnlainge, from the Old Irish "grandsons (or descendants) of Dúnlaing", were an Irish dynasty of Leinster kings who traced their descent from Dúnlaing mac Énda Niada, a fifth-century King of Leinster. He was said to be a cousin of Énnae Cennsalach, eponymous ancestor of the rival Uí Ceinnselaig.

Their claims to the kingship of Leinster were unopposed after the death of Áed mac Colggen in the Battle of Ballyshannon on 19 August 738. Three of the sons of Murchad mac Brain (d. 727), Dunchad, Faelan and Muiredach reigned in turn after him as kings of Leinster. These kings were progenitors of the most powerful branches of Uí Dunlainge in the following three centuries: Uí Dunchada, Uí Faelain and Uí Muiredaig. These three kindreds rotated the kingship of Leinster between them from 750 to 1050. This is unusual in early Irish history as it was the equivalent of "keeping three oranges in the air" (the east Ulster kingdom of Ulaid also rotated the kingship between families). Fourteen Uí Muiredaig kings (from whom descend the O'Toole family) were based at Mullaghmast/Máistín. Nine Uí Faelain kings (from whom descend the O'Byrne family) were based at Naas/Nás na Ríogh and ten Uí Dúnchada kings (later known as the MacGillaMo-Cholmoc and, after the Norman invasion, renamed the FitzDermots) were based at Lyons Hill/ Líamhain nearest to Dublin city. By the end of this remarkable run, the kingship of Leinster was being rotated between seventh cousins.

Tyrconnell (Irish: Tír Chonaill, meaning 'Land of Conall'), also spelled Tirconnell and Tirconaill, was a kingdom of Gaelic Ireland. It is associated geographically with present-day County Donegal, which was officially named County Tirconaill between 1922 and 1927. At times it also included parts of County Fermanagh, County Sligo, County Leitrim, County Tyrone and County Londonderry at its greatest extent. The kingdom represented the core homeland of the Cenél Conaill people of the Northern Uí Néill and although they ruled, there were smaller groups of other Gaels in the area.

From the 5th century founding of Cenél Conaill, the tuatha was a sub-unit of the larger kingdom of Ailech, along with their Cenél nEógain cousins, fellow descendants of Niall of the Nine Hostages. Their initial ascent had coincided with the decline of the Ulaid, whose kingdom of Ulster receded to the north-east coast. In the 12th century the kingdom of Ailech split into two sovereign territories and Cenél Conaill became Tír Chonaill under the Ó Domhnaill (O'Donnell) clan. It was the location of fighting during the Nine Years' War (Ireland) at the end of the 16th century. It continued to exist until the 17th century when it was incorporated into the English-ruled Kingdom of Ireland following the Flight of the Earls.

Airgíalla (Old Irish pronunciation: [ˈœɾʲɣʲiːa̯l̪a]; Modern Irish: Oirialla, English: Oriel, Latin: Ergallia) was a medieval Irish over-kingdom and the collective name for the confederation of tribes that formed it. The confederation consisted of nine minor kingdoms, all independent of each other but paying nominal suzerainty to an overking, usually from the most powerful dynasty. Airgíalla at its peak roughly matched the modern dioceses of Armagh and Clogher, spanning parts of counties Armagh, Monaghan, Louth, Fermanagh, Tyrone and Londonderry. Its main towns were Armagh and Clogher. The name's usage survives as a cultural area of folk tradition in South East Ulster and adjoining areas of County Louth.

According to legend, Airgíalla was founded by the Three Collas, who are said to have conquered what is now central Ulster from the Ulaid. The decisive victory was the battle of Achadh Leithdheirg, said to have been fought around the year 331. However, this tale is thought to be mostly fiction, and the actual year and circumstances of how the Airgíalla confederation came about is unknown.

Lecale (leh-KAHL, from Irish Leath Cathail 'Cathal's half') is a peninsula in the east of County Down, Northern Ireland. It lies between Strangford Lough and Dundrum Bay. In the Middle Ages it was a district or túath in the Gaelic Irish kingdom of Ulaid, then became a county in the Anglo-Norman Earldom of Ulster. Later it became a barony, which was split into Lecale Lower and Lecale Upper by 1851. Its largest settlement is the town of Downpatrick. Other settlements include Ardglass, Killough and Strangford. The peninsula has a high concentration of tower houses. Much of it is part of the 'Strangford and Lecale' Area of Outstanding Natural Beauty.