Whereas the Ch'an Patriarchs of earlier times had been, more often than not, fractious teachers ignored by emperors and gentry alike, the T'ang Dynasty saw Ch'an masters rise to official eminence, receiving honors from the highest office in China. The first half of the eighth century witnessed what was to be the greatest battle within the school of Ch'an, but it was also the time when Ch'an was finally recognized by Chinese ruling circles. The name most often associated with this imperial recognition is the famous, or perhaps infamous, Empress Wu.1 Wu was not born to royalty, but in the year 638, when she was thirteen, she was placed in Emperor T'ai-tsung's harem as a concubine of relatively low rank. Disapproving historians claim that one day she managed to catch the crown prince, the heir apparent to the aging emperor, in what we today might euphemistically call the bathroom, and seduced him at a moment when he was without benefit of trousers. Thus she was already on familiar terms with the next emperor when her official husband, Emperor T'ai-tsung, went to his ancestors in the summer of 649. Although she was only twenty-four years old, custom required that she join all the deceased emperor's concubines in retirement at a monastery--which ordinarily would have been the last anyone heard of her. As it happened, however, the new emperor's first wife was childless, with the effect that he began devoting increasing attention to a favorite concubine. Knowing of the emperor's earlier acquaintance and infatuation with Wu, the barren empress recalled her from the convent, intending to divert the emperor from his current favorite. The cure, however, turned out to be far more deadly than the ailment. Through an intrigue that apparently included murdering her own child by the emperor and then blaming the empress, Wu soon had both the empress and the competing concubine in prison. Not content with mere imprisonment for her rivals, she went on to have them both boiled alive--after first amputating their hands and feet, eliciting a dying curse from the concubine that she would return as a cat to haunt Wu. To escape this curse, Wu permanently banned cats from the imperial compound, and eventually persuaded the emperor to move the government from Ch'ang-an to Loyang, where for the next half century she tried to exorcise the memory of her deed. In late 683 Wu's husband, the emperor, died, and for a time she allowed his son, the true heir, to occupy the throne--until she could find a pretext to take over the government completely.