Prussian Poland Ortssippenbücher

What is an Ortssippenbuch or Ortsfamilienbuch?
An Ortssippenbuch (town lineage book) or Ortsfamilienbuch (town family book) includes birth, marriage, and death data for all persons found in the local records during a specified time period, compiled into families. Sources may include the local parish registers, civil registration records, court and land records, and sometimes published material. In the printed book, this information is then arranged in a standardized format, usually alphabetically by surname and chronologically by marriage date. Family entries are identified by sequential numbers. Town genealogies are known by various names, including “town lineage book,” “local heritage book,” “one-place-studies,” “Ortssippenbuch (OSB),” and “Ortsfamilienbuch (OFB).”

In some cases, these books were written before the records were lost or damaged during the war. A fairly large number of online OFB's are available on [http://ofb.genealogy.net/ Genealogy.net (CompGen). Scroll down the page. The OFB's for modern Germany appear first, but after that OFB's for towns formerly in Germany but now in Poland are listed.