Laudabiliter

Laudabiliter was a papal bull issued in 1155 by Adrian IV, an Englishman, giving the Angevin Henry II of England the right to assume control over Ireland and apply the Gregorian Reforms to the Irish church. The Norman invasion of Ireland ensued in 1169–71 under the authority of this bull. Richard de Clare a Cambro-Norman knight from Pembroke in Wales was retained by the King of Leinster, Diarmuid MacMorrough as an ally in his fight with the Rudhri O'Connor, High King and Tighernan O Ruairc of Brefni to regain control of his Irish kingdom.