>>19590519I haven't read much about it, but keep in mind there were actual norsemen living in that area, maybe they left those behind or organized the architecture, not the slavs.
Slavic languages diverged from the group germanic languages would later arise from during the bronze age, around the time ancient Egyptians were building pyramids, more than a thousand years before germanic languages even existed, and they've been carrying R1a (instead of I1 like the Varangians) for more than 4 thousand years now. Even Finns or Balts don't look the same as nordics, why would Russians?