Book excerpt: "At the dawn of the fifteenth century, Islam invaded Europe from the East and it seemed that Christendom itself was under threat. In an attempt to save Christian world the Emperor Sigismund called the many nations of Europe together for a conference at Constance, beside the Rhine. The Conference attracted the greatest minds in the western world, as well as innumerable princes, lawyers and prostitutes. And amid the confusion hoped to put Europe's house in order." "In The Battle for Christendom, brilliant historian Frank Welsh delves into this important moment in history and shows that it is in fact one of the most central moments in European history. Schism had ravaged the Catholic Church and three Popes claimed the seat of St Peters - which, in Holmesian fashion, Welsh cals a "Three-Pope Problem". There were also dangerous stirrings of reform. Over the next months, debate raged while Sigismund attempted to find a solution. The event would be one of the major turning points in European history - the last event of the medieval world, heralding the dawn of the renaissance and the rise of humanism. Yet it would also hold a darker truth and with the burning of the Czech divine, Jan Hus, saw first moments of the Reformation. The story rises to a conclusion on the battlements of Constantinople in 1453 where, despite all of Sigismund's attempts to repel the Ottomans, the East rose up once more." "The Council of Constance was a high point for the movement that promoted the authority of councils over the authority of the pope, and with good reason - it was a moment in which a group of well-meaning people reshaped the future of their continent. In Welsh's lively retelling, The Battle for Christendom is an exciting and readable story that holds lessons for our own times of international turmoil."--BOOK JACKET.