caption: The image shows a poster of a map of the Prussia region in the 19th century, with text at the top and bottom of the image. The map is divided into two sections, with the top section showing the extent of the Russian Empire and the bottom section showing its borders. The colors used in the map are mostly shades of blue, green, and yellow, with some red and white accents. The text on the poster is written in a bold font and is likely a description of the region.