The offices for Saints Henry and Kunigunde, patrons of the diocese of Bamberg, are transmitted in both monastic and secular forms that manifest several stages of development. In the century after the canonizations of Henry and Kunigunde (1146 and 1200, respectively) their Offices seem to have been celebrated with a preponderance of chants from the common of saints. During the thirteenth century, however, novae historiae, newly composed offices with rhymed or partially rhymed texts and chants in modal order, replaced the older offices. This process parallels in some respects the phenomenon that James McKinnon called ‘properization’. Also examined are questions of how and why newly composed historiae could supplant the traditional forms of these Offices.