What defined the crusades in contrast to other wars was the opportunity for warriors to win a spiritual reward, the indulgence. In The Crusade Indulgence. Spiritual Rewards and the Theology of the Crusades, c. 1095-1216 Ane L. Bysted examines the theological and institutional development of the indulgence from the proclamation of the First Crusade to Pope Innocent III. This first comprehensive study of crusade indulgences in more than a hundred years challenges some earlier interpretations and demonstrates how theologians, popes, and crusade preachers in the 12th century formed the concept of indulgences and argued that fighting for Christ and the Church was meritorious in the sight of God and thus worthy of a spiritual reward proclaimed by the Church

'God wills it, God wills it ' - this was the response to the sermon of Pope Urban II at Clermont in 1095, in which he exhorted his audience to take the cross and liberate Jerusalem. And his words spread, even to the remotest islands in the north of Christendom. For the first time since the mid-nineteenth century, historians have investigated Latin, Danish, German, and Russian source materials about the Danish Crusades in the Baltic region. This team of four Danish medievalists describe how the idea of crusading reached the North and how Scandinavia became involved in the Western European crusading movement. Crusading ideology inspired Danish wars for hundreds of years against the Wends, Prussians, Lithuanians, Estonians and other pagan peoples along the coasts of the Baltic Sea so that in the twelfth and thirteenth centuries Denmark became the dominant crusading power in the region: a Jerusalem in the North. Indeed, crusading remained an important political reality in Denmark until the Lutheran Reformation in the early seventeenth century. Ane L. Bysted holds a Ph.D. from the University of Southern Denmark with a dissertation on the development of the crusade indulgence, and has written on crusade theology and preaching. Carsten Selch Jensen is Associate Professor in Church History at the University of Copenhagen. Has written on crusading history, especially in the Baltic Region as well as on holy and just war in the Middle Ages. Kurt Villads Jensen is Associate Professor in Medieval History at the University of Southern Denmark and chair of the Medieval Centre. He has written on Christian mission and crusades, especially in the Baltic region and Iberia.John H. Lind has written extensively on the Baltic crusades and on relations between Scandinavia, Finland and Russia from the Viking Age up to modern times.