Source
Source: The Imperial Troops under Tilly Storm Magdeburg on May 20, 1631, colored copperplate engraving by an unknown artist, 1631. Staatsbibliothek zu Berlin. bpk-Bildagentur image no. 00006789. For rights inquiries, please contact Art Resource at requests@artres.com (North America) or bpk-Bildagentur at kontakt@bpk-bildagentur.de (for all other countries).