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| Date | | | | | 1115 | | Donald, son of Mortogh O'Brien, and king of the Danes of Dublin, defeats the Irish of Leinster with great slaughter. | | | 1123 | | Turlogh O'Connor, king of Ireland, gives the sovereignty of Dublin to the king of Leinster. | | | 1142 | | The Danes of Dublin invade North Wales, but are repelled with loss. | | | 1146 | | The nunnery of St. Mary de Hogges built outside the eastern gate of the city, afterwards called Dame's Gate, by Dermot McMurrogh, king of Leinster | | | 1152 | | Dublin erected into an archbishoprick by a Bull of Eugenius IV., which was published at the synod of Kells by Cardinal Paparo, the pope's legate. | | | 1162 | | Lawrence O'Toole made archbishop of Dublin. The Danes of Dublin defeated and McMurrogh, king of Leinster spoiled by Dermot | | | 1165 | | The Danes of Dublin send forces to assist Henry II against David Ap Owen, prince of North Wales, but the expedition failed through want of provisions | | | 1166 | | The monastery of All Hallows, or All Saints, built by Dermot, king of Leinster, on the ground on which Trinity College now stands. Roderic O'Connor, King of Ireland, honourably received and entertained by the people of Dublin, who do him homage, and receive from him a present of 4,000 oxen. | | | 1167 | | Dermot McMurrogh expelled by Roderic, who receives hostages from the Danes of Dublin, | | | 1169 | | The Danes of Dublin sue for peace, and give hostages to Dermot and Fitzstephen, the commanders of the English, who landed this year at Bannow, in the county of Wexford, | |
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