This workshop will examine the question of the use of the harp to accompany chant in medieval Ireland. Iconographic and documentary evidence will be assessed and interpreted in the light of our understanding of Christian liturgy in order to understand when and where the harp may have been used in Christian worship. The question of how the harp was used will also be examined with reference to medieval understandings of modality, the physical characteristics of the harp, and insights from research on other monophonic repertories. In particular, the work of Thomas Binkley in creating improvisational accompaniments for vernacular medieval song repertories will be used as a guide to how harp accompaniments might have sounded in medieval Ireland.