Prusia Actually the Prussian Landesflagge from 1892-1918. Used as state flag on land and as civil flag on land. https://creativecommons.org/publicdomain/mark/1
I, the copyright holder of this work, hereby publish it under the following license: English author name string: Sangjinhwa Wikimedia username: Sangjinhwa
I, the copyright holder of this work, hereby publish it under the following license: English author name string: Sangjinhwa Wikimedia username: Sangjinhwa