This book studies Danish resources in the Middle Ages. A comprehensive study of this nature has never been published before, nor does a major economic history of medieval Denmark exist. A very brief account of the period lasting from the twelfth century to the mid-sixteenth century was published in 1933. In its own time it was an excellent contribution, but it is now dated, of course. It is characteristic of this situation that the most recent economic history of Denmark begins in 1500.' Nonetheless, the quantity of research carried out on economic and social aspects of medieval history is huge.