1141 - 1150 AD
1142 AD 109.Conor / Conchobar na Catharach O Brian the Heberian Dal gCais Ui Bloid Ui Turlogh Ui mBriain King of Northern Munster / Thomond, died at his fortress at Killaloe in Co. Clare in the north - east of the Munster Province. (He had been a son of 108.Diarmait O Brian the previous 45th King of Cashel / Munster, who had died in 1118 AD). *109.Turlogh O Brian, his brother, who had been the Prince / Tanaiste of Thomond became the new Dalcassian 46eKing of Northern Munster / Thomond, and due to the recent demise of 109.Cormac 11 Mac Carthy the Heberian Eoghanacht King of Cashel / Munster he was to also become the 46e King of Cashel / Munster until 1167 AD. 110.Murtogh O Brian, his son, became the new Prince / Tanaiste of Thomond, and his younger brother, 109.Teague / Tadhg Glae O Brian became the Prince / Tanaiste of North Eastern Munster / Ormond / Aur Muma territory situated in Co. Tipperary in the east of Munster, that overlapped the territory in Co. Kilkenny in the south - west of Southern Leinster, in the nearby Heremonian Ui Laoghaire Ui Connla kingdom of Ossory, which was all originally in Mogha's Half.
*109.Turlogh O Brian as the new Heberian Dalcassian 46e King of Cashel / Munster also had personal ambitions of re - gaining the Kingship of Ireland for the Heberian Dal gCais Sept, and to assert his new found overall authority in this regard, he began laying siege to the various Septs / Fines situated in the surrounding territories also in Mogha's Half, hoping to eventually bring this desired result about and at first he besieged the territory there in Mogha's Half of the stronger Heremonian Cu Corb Septs in Co. Wexford in the east of Southern Leinster, which were now under the control of 113.Diarmait Mac Murrogh na Gall - of the Foreigners the Heremonian Cu Corb Ui Cheinnselaig 59th King of Leinster. *109.Turlogh O Brian then began an even more ambitious step by laying siege to the north - west of the Munster Province up into the Connacht Province, against the main Dal Cuinn Ui Briuin Sept there who were under the leadership of *114.Turlogh O Connor the Ui Briuin Ai 55th King of Connacht who was now also the 181st King of Ireland. He then besieged his Heberian Eoghanachta kinsmen in Southern Munster who were now under the control of 110.Diarmait Mac Carthy who had his kingdom in Co. Kerry in the south - west of Munster. Meanwhile, unbeknown to him, his younger brother, 109.Teague Glae O Brian the Prince / Tanaiste of Aur Muma / Ormond in the north - east of Munster and the Heremonian Ui Laoghaire Ui Connla Gilla Patraic Sept in the adjacent territory in Co. Kilkenny / Ossory had made an alliance with *114.Turlogh O Connor the Ui Briuin Ai 181st King of Ireland and also with the infamous 113.Diarmait Mac Murrogh na Gall - mof the Foreigners the Cu Corb Ui Cheinnselaig 59th King of Leinster against him and combining their efforts they besieged *109.Turlogh O Brian the 46e King of Cashel / Munster in the south of Co. Limerick in Munster and a raging battle occurred in which *109.Turlogh O Brian was defeated. Among the many Dalcassian aristocratic warrior Fines who were to die on this occasion were many of the O Brians, the O Kennedys, the O Deas, the O Shannons, the O Quins, the O Gradys, the O Hogans, the O Lynchs, the O Hehirs, the O Hearns and the Co. Clare O Nialls / O Nihills. (The end result of this particular battle would be that *114.Turlogh O Connor the Dal Cuinn Ui Briuin 181st King of Ireland was to regain complete control also over Munster.) After the conflict *109.Turlogh O Brian the 46e King of Cashel / Munster was to flee to the north to *114.Turlogh O Connor's opposition, *111.Murtogh Mor Mac Loughlin / Muirchertach Mac Lochlainn the Dal Cuinn "northern" Ui Niaill Cenel nEogain 55th / 57th King of Aileach, who had his kingdom and territory in the north of the Ulster Province who now also had designes on the Kingship of Ireland. Not only did he need personal protection for himself, but he also badly needed assistance to retrieve what he had already lost and while he was off the scene, his younger brother, 109.Teague Glae O Brian was to be promoted, to once again to divide the Heberian Septs / Fines further, by *114.Turlogh O Connor, to be the Prince / Tanaiste of Northern Munster / Thomond instead, and 110.Diarmait Mac Carthy became the Prince / Tanaiste of Southern Munster / Desmond.
Mellifont Abbey in Co. Louth in the north - east of Northern Leinster was to become the first Cistercian friary to be built by St. Malachy O Morgair, who was now the Catholic Archbishop of Armagh, on the previous church ruins there on the River Mattock / Matlock, which divided Co. Louth from Co. Meath in the east of Northern Leinster where the land there had been given to him previously by Donogh O Carroll the Dal Cuinn Colla Da Crioch King of Orghialla / Oriel, whose kingdom was then made up of territory in Co. Armagh and Co. Monaghan in the south of the Ulster Province and Co. Louth in the north - east of Northern Leinster. He also assisted him to establish the Cistercian Order, as the monks were sent over by St. Bernard from Clairvaux in France, and they were then to spread their order to the various Abbeys, including Bective, Boyle, Monaster Anenagh, Baltinglass and Shrule. Later on after the Anglo Norman English Invasion, Monasterboice, Jerpoint and Innis Fallen were also to come under Anglo - Norman influence and they were then to exclude the Celtic Irish monks, which would mean that the influence of St. Patrick's Celtic Catholic Church was coming to an end. St. Malachy O Morgair was also given land in Ulster by *111.Murtogh Mor Mac Loughlin the Heremonian Dal Cuinn "northern" Ui Niaill Cenel nEogain King of Tyrone / Tir Eogan who was the 55th / 57th King of Aileach, vying for the Kingship of Ireland, who also invited French monks from the Cistercian monastery of St. Bernard into the north - east of Ireland after the building of the Abbey at Mellifont on the River Mattock in Co. Louth had begun.
The Shrine to St. Manchan / Tempall Manchain was built this year at Boher in Co. Offaly in the mid - west of Southern Leinster.
1144 AD 115.Conor O Connor who had been appointed the Dal Cuinn Ui Briuin Ai King of Meath, by his father, died this year, and his father, *114.Turlogh O Connor the Dal Cuinn Ui Briuin 55th King of Connacht and 181st King of Ireland divided the Dal Cuinn "southern" Ui Niall kingdom there in Meath / Midhe in the south - east of Northern Leinster again, and although it was all in his favour at the time, he made one fatal mistake for the future of Ireland, when he gave the infamous 113.Diarmait Mac Murrogh na Gall - of the Foreigners, who was the Cu Corb Ui Cheinnselaig 59th King of Leinster, over - lordship of half of the eastern portion of Meath, during his divisions, which only further stimulated 113.Diarmait's own personal ambitions towards raising his whole profile even further pesonally also towards gaining the KIngship of Ireland.
1145 AD Christian O Conarchy this year became the first Catholic Abbot of Mellifont Abbey in Co. Louth in the north - east of Northern Leinster.
1146 AD
Both Cathasach O Casey, and Conor O Casey who was the Catholic Archbishop of Leinster, died this year.
The Cistercian
Bective Abbey
was founded at
Ceanannus Mor / Kells in
Co. Meath
in the south - east of Northern Leinster
and is situated on the way to Navan,
which was the Cistercians second
foundation in Ireland up until this time, and the ruins are still there to be seen.
1147 AD Durcan O Hara the Heberian Cianacht sub - Chief of Leyney in Co. Sligo in the north - west of the Connacht Province, died this year.
Daniel O Longergan was now the Heberian Dal gCais Ui Bloid Ui Turlogh Chief of North - East Munster / Ormond.
1148 AD Patrick was now the Catholic Bishop of Limerick in Co. Limerick in the mid - north - west of the Munster Province.
A
religious
Catholic Synod was held at
Skerries on
Inis Patraic (The Island of
Patrick) off the coast of Dublin
in the north - east of Southern Leinster where
15 Catholic Bishops, including
St.
Malachy O Morgair,
Gelasius, and
500 Catholic Priests attended,
and where they
delegated St. Malachy to go to
Rome to represent them with the Pope Eugene 111, but he was to die
on the way on
November 1st at Clairvaux
in France, while he was with St,
Bernard who then interred him before the high altar in the Abbey Church
there.
*111.Murtogh Mor Mac Loughlin the Heremonian Dal Cuinn "northern" Ui Niaill Cenel nEogain King of Tyrone / Tir Eogan the 55 / 57th King of Aileach who had his kingdom in the Ulster Province decided to also renew his grandfather's policy of divide and rule there also, and to this end he separated the kingdom of the Ulaid Septs in the east of Ulster, between 4 of their Chiefs / tigernai rather then their Kings and this upset Donogh O Carroll / Donnchad Ua Cerbaill the Dal Cuinn Colla Da Crioch King of Orghialla in Southern Ulster, who although he was in reality *111.Murtogh Mac Loughlin's vassal, he then personally reinstated 112.Cu Ulaid Mac Dunlevy / Mac Duinn Sliebe as the Dal Fiatach 64th King of Ulaid there.
*109.Turlogh O Brian
the
Heberian Dal gCais
Ui mBriain
King
of Northern Munster / Thomond
this year
founded Anenagh Abbey
as a Cistercian
monastery
on the River Camoge
in Co. Limerick
in the mid - north - west of the
Munster Province.
Diarmait O Kelly the Dal Cuinn Colla Da Crioch Ui Maine King of Orghialla / Oriel who had his personal territory in Co. Louth in the north - east of Northern Leinster founded the Dominican friary of St. Mary at Louth / Lubhadh there, while St. Mochta's House there in Louth was also built, which was named after St. Mochta the first Catholic Bishop of Louth who had been originally appointed there by St. Patrick.
113.Dermott Mac Murrogh na Gall - of the Foreigners the Heremonian Cu Corb Ui Cheinnselaig 59th King of Leinster founded Baltinglass Abbey in Co. Wicklow in the south - east of Southern Leinster with Cistercian monks from Mellifont, and also the All Hallows monastery in Dublin in the north - east of Southern Leinster where the Trinity College now stands.
1150 AD The Book of Leinster was composed this year.
*111.Murtogh
Mor
Mac Loughlin
At this time the Heremonian
Ui Laoghaire Ui
Connla kingdom of Ossory
in
Co. Kilkenny in the
south - west of Southern Leinster was inhabited by the
many aristocratic warrior Gaelic Milesian Septs of the
Mac Giolla Phadraigs
who after the coming Anglo Norman English Invasion due to
their proximity to Dublin would eventually
Normanize their own personal name to Fitz Patrick
and among their other important Septs were the
O Brennans
/
Ui Braonain,
the O Kealys
/ Ui Caollaidhe,
the
O Phelans
/ Ui Faelain, the
Mac Breens
/ Mheic Brain,
the
O Muldowneys
/ Ui Maol Domhnaigh,
and
the O Carrolls / Ui
Cearbhaill.
Murray O Duffy
/
Muireadhach Ua Dubhthaigh the Catholc
Archbishop
of
Connacht,
died this year at the age of
75 years, and
*114.Turlogh O Connor
the
55th King
of
Connacht
and
181st King of Ireland
removed the
Cross of Cong, which was originally at
Tuam,
that contained a
splinter from the
True Cross of Christ, that he had
previously had made for the Archbishop
there and it
was now to gain its name from
the Cong Abbey
/
cunga
(narrow headland), to where he
had it removed, which is situated in
Co. Mayo above
Co.
Galway
in the south of the Connacht Province, where it separates
Loch Corrib from
Loch Mask, which he had also founded and
endowed.
It
was during this period in time that the emerging Heberian
Eoghanacht Mac Carthys
of
Southern Munster /
Desmond
/
Des Muma
were to also be in conflict with their kinsmen
the Heberian
Eoghanacht Moriartys / Ui
Muircheartaigh, and they
were to then drive them out of their territory in
Co.
Kerry
in the south - west of the
Munster Province.
The
Cistercian monks initially set up at
Mellifont
Abbey
now
also set up an
Abbey at
Abberrule in
Co. Longford
in the north - west of
Northern Leinster.
Diarmait O Dempsey / Ua Diomasaigh the Heremonian Cu Corb Ui Failge / O Faly Clann Maelugra Prince / Tanaiste of Offaly in the north - west of Southern Leinster, this year founded a monastery also nearby at Monasterevin in Co. Kildare in Central Southern Leinster. He was directly descended from *90.Cahir / Cathair Mor who had been the 109th King of Tara / Ireland, through one of his 9 sons, 91.Ros Failge the direct male line ancestor of the Ui Failge / Ui Conchobair Failghe / O Connor Faly Sept that included the O Dunne / Ui Riacain Sept and the O Dempsey / Ui Diomasaigh Sept.