Coelln was founded by German settlers. Berlin, on the other side of the river, was a Slavic town. The Slavs were eventually pushed East and the two towns merged into a city of a Germanic character.
Maybe they need to dig deeper. :’)
Near Army construction site in Germany, a trove of ancient Roman artifacts
http://www.freerepublic.com/focus/chat/2347873/posts
Ancient Roman battlefield excavated in Lower Saxony[Germany]
http://www.freerepublic.com/focus/chat/2147810/posts
German battlefield yields Roman surprises
http://www.freerepublic.com/focus/chat/3019050/posts
Archaeologists excavate Roman soldier’s chain mail
http://www.freerepublic.com/focus/chat/3067175/posts
Report: Ancient Roman graveyard found in suburban Copenhagen
http://www.freerepublic.com/focus/chat/1909864/posts