"This clearly structured and engagingly written work presents an original methodology that combines examination of space, art, texts, and practices in an effort to understand more fully the Catacomb of Callistus and its paintings, especially those in the Cubicula of the Sacraments, in their multiple contexts. I was glad to accept the author's imaginative opening invitation to walk with 'Callistus' and ponder the paintings of 'Dionysus' for a vivid four-dimensional experience of early Christian catacomb painting." - Elizabeth Struthers Malbon, Professor, Religion and Culture, Virginia Tech, USA and author of The Iconography of the Sarcophagus of Junius Bassus: NEOFITVS ITT AD DEVM