Historical Black-Yellow-White Nordic Cross Flag - Symbol of Holstein & Northern German Heritage #1345853 (License: Personal Use)

This flag features a golden-yellow Nordic cross centered on a black field, bordered by thin white stripes (fimbriation), reflecting 19th-century German regional heraldry. It closely resembles the historical flag of the Duchy of Holstein, used during the German Confederation era and associated with Schleswig-Holstein nationalism. The design emphasizes contrast and symbolic clarity, rooted in medieval Scandinavian and Germanic vexillology.

Used in historical articles, museum exhibits, or cultural heritage websites discussing Schleswig-Holstein, German unification, or regional identity; targets users researching European flags, heraldry, or 19th-century German history.