Juliana of Mont-Cornillon (1193–1258) was a prioress and visionary who inaugurated the Feast of Corpus Christi. She composed an extensive divine office in Latin for the feast which was used locally in the early years of the feast. This divine office, known as Animarum cibus, presents Eucharistic theology in a complex, poetic form. After her death, Eve of St-Martin wrote a vernacular hagiography of Juliana, which was later translated into Latin. An increasing amount of scholarship points to Juliana’s authorship of the office and her unique role in founding the Feast of Corpus Christi.