The area was more than likely 1st settled by Slavs ahead of German-Talking immigrants arrived inside the 11th and 12th centuries. The earliest evidence of settlements in the area of what's now Berlin absolutely are a wood rod relationship from roughly 1192 and remains of picket houses dated to 1174 https://pc-reports.de/krimidinner-in-berlin-ein-moerderisch-guter-abend