Many Germans reconverted to pagan religions. Europe developed several centralized kingdoms that occurred as a result of the Viking invasions of Europe in the ninth and tenth centuries.
The Viking invasions virtually came to a halt in the tenth century due to the continual Christianization of the Viking tribes, the acceptance and emergence of the Viking tribes into European life and due to the firm grip kings and rulers were finally able to gain over their tribes. The presence of Norse raiders had a profound impact on medieval Europe. Trade routes established by the Vikings promoted the flow of coins, silver, and limited goods from the Middle East to Northern Europe.
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