Question

What was the impact of northern European peoples upon western European medieval culture???????????????????????????????????????????

Answer 1

Is this is multiple choice or thinking cap question?

Answer 2

Thinking :P

Answer 3

This would involve Islam, their influence on Northern Europe involved the creation of Mathematics, which spread to Spain and Italy, sooner or later, Geometry and Algebra were created.

Just one of the few North-Western impacts on Western civilization :)