With the coming of Christianity two centuries later the system received a new strength and unity. Loeghaire, the Monarch at the time, was himself a man of considerable strength and ability, and Patrick was an administrator of power and insight. The fact that the laws were revised in the general assembly at Tara, in order to bring them into conformity with the teaching of Christianity, was in itself an impetus sufficient to brace the system anew; and a further strength was given when Patrick based his church system on the political system, making the units of one identical with the units of the other. Only two things remain to be mentioned in the making or unmaking of the polity. After the battle of Ocha, in the year 482, the dynastic family broke, the older line continuing as kings of Connacht, while the younger line held the monarchy at Tara. While it continued at Tara, with its central situation, it could hold its authority, though, as with all monarchies, its authority depended upon the personality of the monarch. But with the abandonment of Tara, after 1560, this authority was at once weakened, having to be exerted sometimes from the far north. The system, however, continued, because its device was such that it could continue itself. The State existed, complete in all its parts, at once simple and complex, sufficient for its own maintenance; but the strong central directive was lacking; for the tendency towards centralisation was suspended with the abeyance of the dynastic struggle. It was supplied, however, when Brian Borumha sprang into the field, and snatched the monarchy from a weakened line. Brian rallied the nation, and knit and perfected the system that Cormac had created. A simple, and indeed very modern, method existed to his hand that was partly turned to his purpose. It is customary to speak of the Leabhar na gCeart as the Book of Rights, or Tributes. The modern word, however, is Taxes; for taxes remain taxes whether they be paid in coin or in kind. Each of the seven great territories, into which the provincial authorities had devolved, had some time prior to Brian laid down a regular revenue to be contributed to them by the stateships under their authority. This had been done as a national system, and had been committed to writing in one book. Brian, having transferred the Kingship of Thomond to his own line, revised the contributions accordingly within his own particular territory. He also took contributions from each of the other six Kingships as Monarch of the Nation. It only therefore required the centralisation of what was really a fiscal system to complete the unity and central function of the State. For so statecraft has always been compelled to meet the same difficulty that confronted Brian in A.D. 1002.