Adam of Bremens history of the see of Hamburg and of Christian missions innorthern Europe from the late eighth to the late eleventh century is theprimary source... » 

Adam of Bremens history of the see of Hamburg and of Christian missions innorthern Europe from the late eighth to the late eleventh century is theprimary source of our knowledge of the history geography and ethnography ofthe Scandinavian and Baltic regions and their peoples before the thirteenthcentury. Arriving in Bremen in 1066 and soon falling under the tutelage ofArchbishop Adalbert who figures prominently in the narrative Adam recordedthe centurieslong campaign by his church to convert Slavic and Scandinavianpeoples. His History vividly reflects the firsthand accounts he received fromtravelers traders and missionaries on the peripheries of medieval Europe. «