St Anskar, a monk of Corbie and Corvey, is often referred to as the ‘Apostle of the North’. In 826 he was attached to the retinue of Harald, king of Denmark, upon the king's baptism at the court of Louis the Pious; Anskar was sent to evangelize first the Danes, who were an increasing threat to the northern border of the Empire, and then the Swedes of the Mälar region, whose rulers may have hoped for imperial favour. If the mission of Anskar and his immediate successors had significant and enduring effects beyond his death in 865, however, they have so far failed to make themselves known to historians. The see of Hamburg-Bremen, of which Anskar was the first archbishop, had indeed been given responsibility for the northern mission-field, and successive popes renewed their theoretical support for this goal; but activity, let alone success, was not conspicuous for many years thereafter. The conversion of the Scandinavian peoples had to wait, and when it came the impetus was not from Hamburg-Bremen alone. Rather, the story of the Christianization of Denmark, Norway and Sweden from the later tenth century through the eleventh is one with a significantly English cast and an English script, although the German church – and maybe others – never quite withdrew from the stage. Scandinavian historians have long been concerned with this missionary activity of Anglo-Saxon churchmen, but it has attracted undeservedly less interest and attention on this side of the North Sea.