Contains 25 articles by different authors in German, English, French and Dutch. This commemorative volume, published on the occasion of the 1250th anniversary of the death of the Anglo-Saxon missionary Saint Willibrord, gathers a series of scholarly essays exploring the Christianization of the Low Countries, the founding and influence of the Abbey of Echternach, and the cultural and historical development of the region between the Meuse and the Rhine. The work reflects on Willibrord's legacy as the Apostle of the Netherlands and on the monastic tradition he inspired. This scholarly book presents research papers on the life, missionary work, and historical context of Saint Willibrord (658-739). It explores the spread of Christianity in Frisia, the foundation of Echternach Abbey, and its political and economic role within the Carolingian realm. Further chapters deal with early medieval manuscripts, archaeology, and the cultural exchange between Anglo-Saxon England and continental Europe.