Into the ranks of noble courtiers, Richelieu struck terror. By means of spies and trickery, he ferreted out conspiracies and arbitrarily put their leaders to death. Every attempt at rebellion was mercilessly punished, no matter how exalted in rank the rebel might be. Richelieu was never moved by entreaties or threats--he was as inexorable as fate itself. [Sidenote: Demolition of Private Fortifications ] The cardinal did not confine his attention to noblemen at court. As early as 1626 he published an edict ordering the immediate demolition of all fortified castles not needed for defense against foreign invasion. In carrying this edict into force, Richelieu found warm supporters in peasantry and townsfolk who had long suffered from the exactions and depredations of their noble but warlike neighbors. The ruins of many a _chateau_ throughout modern France bear eloquent witness to the cardinal's activity. [Sidenote: Centralization of Administration] [Sidenote: The Intendants] Another enduring monument to Richelieu was the centralization of French administration. The great minister was tired of the proud, independent bearing of the noble governors. Without getting rid of them altogether, he checked these proud officials by transferring most of their powers to a new kind of royal officer, the intendant. Appointed by the crown usually from among the intelligent, loyal middle class, each intendant had charge of a certain district, supervising therein the assessment and collection of royal taxes, the organization of local police or militia, the enforcement of order, and the conduct of courts. These intendants, with their wide powers of taxation, police, and justice, were later dubbed, from their approximate number, the "thirty tyrants" of France. But they owed their positions solely to the favor of the crown; they were drawn from a class whose economic interests were long and well served by the royal power; and their loyalty to the king, therefore, could be depended upon. The intendants constantly made reports to, and received orders from, the central government at Paris. They were so many eyes, all over the kingdom, for an ever-watchful Richelieu. And in measure as the power of the _bourgeois_ intendants increased, that of the noble governors diminished, until, by the eighteenth century, the offices of the latter had become largely honorary though still richly remunerative. To keep the nobles amused and in money, and thereby out of mischief and politics, became, from Richelieu's time, a maxim of the royal policy in France. [Side Note: Richelieu's Significance]