Karte des westlichen Russlands, 1897–1921

At 1:100 000. Kartographische Abtheilung d. Konigl. Preuss. Landes -Aufname.”

German topographical maps (a full set of the area is about 470 sheets), based on late 19th and early
20th century Russian maps, for most of (but not all of)  Lithuania: the thumbnails are
keyed to the first map.