This dissertation challenges the conventional understanding that Song dynasty China (960–1279) was a period when Confucianism was placed at the center of governance. Bringing heretofore inadequately studied Buddhist and Daoist texts into discussion, it offers three case studies on interrelationships between Song emperors and the Three Teachings of Daoism, Buddhism, and Confucianism. As shown in all three cases, although a religious campaign directed by the emperor and his institutional apparatus could set out under the influence of a certain teaching/religion, the campaign’s outcome at the state level would often be a fusion of various religious and cultural components. My research suggests that Song emperors employed an eclectic strategy in selecting and utilizing elements from the Three Teachings and attempted to build an imperial religion centered around themselves. As such, Song imperial power emerged as a centripetal force that compelled the Three Teachings to tailor themselves to the imperial religion. Therefore, I term the Song imperial court as a “regulated syncretic field” where segments from different religious traditions became amalgamated into religious/ritualistic entities that served imperial visions of the time. Although proponents of the Three Teachings by and large continued their efforts to gain imperial acceptance of their teachings, they often turned to local society to ensure their authority when their efforts at the court failed. Further, I argue that such phenomena were rooted in the mechanism of patriarchal governance in which the emperor considered themselves and was considered by leaders of the Three Teachings to be the patriarch of his household/empire, who was responsible for balancing the power structure among the Three Teachings.