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 to enforce the Gregorian Reforms on the Catholic Church in Ireland. The leaders of the Norman invasion of Ireland (1169–71) would later claim that Laudabiliter authorised the invasion. Rich... Found on http://en.wikipedia.org/wiki/Laudabiliter