The frugality and modesty of his court have already been referred to. The later Mongols were fond of a lavish display, and expended large sums on banquets and amusements. At Pekin one of their emperors had erected in the grounds of the palace a lofty tower of porcelain, at enormous expense, and had arranged an ingenious contrivance at its base for denoting the time. Two statues sounded a bell and struck a drum at every hour. When Hongwou saw this edifice, he exclaimed, "How is it possible for men to neglect the most important affairs of life for the sole object of devoting their attention to useless buildings? If the Mongols in place of amusing themselves with these trifles had applied their energies to the task of contenting the people, would they not have preserved the scepter in their family?" He then ordered that this building should be razed to the ground. Nor did this action stand alone. He reduced the size of the harem maintained by all the Chinese as well as the Mongol rulers, and he instituted a rigid economy in all matters of state ceremonial. Changtu, the Xanadu of Coleridge, the famous summer palace of Kublai, had been destroyed during the campaigns with the Mongols, and Hongwou systematically discouraged any attempt to embellish the northern capital, Pekin, which, under the Kin and Yuen dynasties, had become identified with foreign rulers. Pekin, during the whole of the Ming dynasty, was only a second-rate city, and all the attention of the Ming rulers was given to the embellishment of Nankin, the truly national capital of China.