Welcome to this website dedicated to the region of Europe that was once called Posen.  It was a region of Prussia up until the early 1900s.  The region is now part of present day Poland.  This website is also dedicated to the Birkholz family that resided in this region during the late 1700s and throughout the 1800s.  I have a few maps of the region that span throughout the 1800s that are also available for viewing.