Mont-Saint-Michel looms above a wide bay opening out onto the English Channel, lashed by the most powerful sea’s tides in Europe. This jewel of the Middle Ages is made up of a vast monastic ensemble perched over a village fortified by ramparts. Like Rome and Santiago de Compostela, Mont-Saint-Michel counted amongst the most illustrious pilgrimage sites in the medieval Western world. Over one thousand years after the emergence of this spiritual centre, the abbey’s religious vocation still lives on, attested to by the presence of a monastic community, Frères et Sœurs des Fraternités monastiques de Jérusalem, and the perenniality of the pilgrimages. This book invites readers to discover the history and architecture of Mont-Saint-Michel, without ignoring the problem of the mount’s sedimentation, a true challenge for future generations.