The Chinese Rites Controversy is a question that is as much ecclesiastical or missiological as sinological, and the researcher, therefore, has to attempt to embrace two very complex and demanding fields. It was, of course, an argument about cross-cultural understanding (and misunderstanding), and the peculiarities of Chinese religion and language; and an episode in the fraught historical relations between China and the West. But the controversy itself was ecclesiastical, among ecclesiastics, and it was the papacy and its offices which determined the outcome.