Examples of Polish cancellations on German postage stamps
Before Poland recovered its independence in 1918, Austrian, German and Russian stamps were used on Polish land. Collecting Polish cancellations on non-Polish stamps can be a welcome addition to your Polish stamp collection. Placenames used for German cancellations are generally in the German language only.
Bunzlau, Norddeutscher Postbezirk
(Bolesławiec, Northern German postal area)
Kartenmeister - Database search utility
Index of locations in Poland with their former German and current Polish Names
Index of German-Polish and Polish-German names of the localities in Poland & Russia
German placename etymology