The circumambulation of the Ka’ba is one of the most famous rituals of the Hajj. Why do Muslims perform the walk in counter-clockwise circles around the ka’ba and what significance does this have? In this episode, Francesco Chiabotti, Shazuan Sidek and Khadijah-Ali Campbell talk about the significance of spheres and circles in Islamic cosmology and how this can expand our understanding of gathering during the Hajj.