Jessica Hughes introduces her ongoing research project on the Catholic sanctuary of the Blessed Virgin of the Rosary in Pompeii, Italy. Focussing on the writings of the sanctuary’s founder, Blessed Bartolo Longo (1841-1926), she explores how far early devotion at Pompeii was anchored within the local terrain – a complex, enchanted landscape made up of multiple layers, both historical and geomorphological. In doing so, she also thinks about how the many international devotees of this Italian Madonna have developed material techniques for connecting with the deeply sacred landscape of the Pompeian Valley.