From Paris to Vienna, from author to authority, this book tells the story of the intellectual journey of the Cistercian James of Eltville, who lectured on the Sentences at Paris in 1369-1370. With the support of the ERC-Starting Grant THESIS, a team of young scholars honed their skills in palaeography and immersed themselves in medieval philosophy and theology in the company of Eltville’s 25 surviving manuscripts. The results of their labor, curiosity and passion are gathered in this volume, which describes how Eltville developed the thought of earlier fourteenth-century theologians, such as John of Mirecourt, Gregory of Rimini, Thomas of Strasbourg, Alfonsus Vargas of Toledo, and John Hiltalingen of Basel, and passed on his synthesis to later generations of scholars. It fills a major gap in the current historiography of a relatively neglected period in intellectual history.