This essay argues that the notion of sacramentality is important for a contemporary theology of aesthetics. It offers a historical sketch of how the term "sacrament" was used from the New Testament over Augustine to the high Middle Ages when the seven sacraments were established for in the medieval Latin Church (and the later Catholic Church). An earlier broad notion of sacraments as holy signs was, however, preserved as part of an understanding of the notion of holiness, outside the main focus of theologians, not least in (much) later Protestant thought. Such notions were appropriated, not least in the nineteenth century in artistic contexts, such as Richard Wagner's Kunstreligion, whereas Rudolf Otto in the twentieth century attempted to bring them back to the attention of theologians.