The second assumption about Ayudhya as a successful centralized kingdom is a consequence of conceptualizing the reforms of King Trilok as a watershed in the Ayudhya poitical system in the second half of the 15th century. Trilok's been famous rearrangement of the Ayudhya administration ha understood as a tremendous attempt by a central Thai king to establish the first centralized bureaucratic system in order to put an end to the weakness of the previous system in which kinship connection and marriage alliances were the major in gredients, HG Quaritch Wales, for example, believed that King Trilok, with the help of Khmer officials, captured and brought back to the Siamese court by his father, Boromracha ll, after the sack of Angkor Thom in A D. 1431, could strengthen his power by changing the basis of the feudal system from a territorial to and by evo ng a centralized and function a personal one y differentiated sys of administra n for the area now placed under the direct control of the capital."
King Trilok's Phra Aiyakan Tammaeng Na Phonlaruan, Phra Aivakan Tamnaens Na Thaluan g and Kot Montie ban (Law of the Civil Hierarchy, the Laws of the Military of 1454 and the Palatine Law of 1458) are commonly used by his torians as blue prints to characterize the pattern of the admin- istrative system of ancient Ayudhya and to evaluate its degree of centralization from the 15th century onward. Trilok's pat tern of provincial hierarchies and Pa ne Law has been un derstood to mean that regional rulers whose ancestors had ruled over independent principalities were unwillingly replaced by members of the central dynasty sent by the king after their region had been annexed and made part of Ayudhya. As a result their autonomy completely perished as in the case of Sukhothai. In my opinion, the reforms of King Trilok did not remove the autonomy of the regional governors. In actual practice, the king at the capital en had make a compro- mise by selecting provincial governors from the family o families of their own ang (city). In the latter half of the 17th century La Loubere, the French ambassador to King Narai's court, observed that the governorships of muang tended to be hereditary and because of this "it is no difficult matter for some these Governors, and especially the most powerful