Friesack is a town in the Havelland district, in Brandenburg, Germany. It is situated 22 km northeast of Rathenow, and 25 km southwest of Neuruppin. It is known for its Mesolithic archaeological site.
Wikipedia https://en.wikipedia.org/wiki/Friesack
Official Website http://www.amt-friesack.de/
Coordinates 52°44'22.294" N 12°34'41.751" E