This paper addresses the roles of Irish Catholic female religious institutes for teachers in the context of the recent debates about education and empire. Nineteenth century colonial South Australia provides an opportunity to examine such institutes, for example the Irish Dominicans from Cabra Dublin, the Irish Mercy Institute from Baggot Street, Dublin, and to a much lesser extent, the English Dominicans from Stone in England. The discussion canvasses the notion of the role of these religious teachers within three empires: the British Empire, the Irish church acting as a "Second Empire", and within a third empire, the "Woman's Empire". Key aspects in examining the flow or transference of education by these Sisters in a colonial setting, lie in their own histories, their spiritual focus, the schools they established for their students, and the curriculum they adopted in the social and geographic environments in which they found themselves.