Distribution of Germans around Europe. (exact source unknown)pic.twitter.com/30SG0PsOzV
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Radzilowski's, A Traveller's History of Poland
it's fairly well known to anyone familiar with 13th to 15th century Polish history. The Germans provided necessary skills.
Magdeburg Rights (German but originally of Flemish origin) were critical in Eastern city development from Krakow to Kiev.
Germans and later Poles formed the townships of the East in the vast eastern plains dotted with small farm villages.
that's why cities like Vilnius or Lwow were inhabited by Poles but the surrounding areas by Lithuanian or Ukrainian farmers.
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