Nail Men or Men of Nails (German: Nagelmänner) were a form of propaganda and fundraising for members of the armed forces and their dependents in the Austro-Hungarian Empire and the German Empire in World War I. They consisted of wooden statues (usually of knights in armour) into which nails were driven, either iron (black), or coloured silver or gold, in exchange for donations of different amounts. Some took different forms, including pillars, shields or local coats of arms and crosses, especially the Iron Cross, and in German there are a variety of alternate names for them, including Wehrmann in Eisen or eiserner Wehrmann (Iron Guardian), Nagelfigur, Nagelbild or Nagelbrett (Nail Figure or Nail Board), Wehrschild (Defence Shield) and Kriegswahrzeichen (War Monument). The most famous were the original Wehrmann in Eisen in Vienna and the 'Iron Hindenburg', a 12 metre (42 foot) statue of Hindenburg adjacent to the Victory Column in Berlin.
The idea for the Nail Men came from the in Vienna, a tree-trunk which had had nails hammered into it for centuries. The first Nail Man, a medieval knight, was set up in Vienna and was first nailed on 6 March 1915 in a public ceremony attended by many dignitaries, including members of the imperial household and the German and Ottoman ambassadors. They were promoted as a patriotic fund-raising method in German-speaking parts of the Austro-Hungarian Empire and also in the German Empire, including by publications such as Gotthold Riegelmann's Der Stock in Eisen: praktische Ratschläge zur Errichtung einfacher Nagelholzmale mit Ideenskizzen und Kostenberechnungen (The Stock im Eisen: practical advice on the erection of simple wooden monuments for nailing with sketched ideas and cost calculations) and Benno Fitzke and Paul Matzdorf's Eiserne Kreuz-Nagelungen zum Besten der Kriegshilfe und zur Schaffung von Kriegswahrzeichen (Iron cross nailings for the best benefit of war aid and for the creation of war monuments). They have been seen as "fit[ting] in much more closely with Protestant celebrations of the Prussian military genius and the grandeur of the Kaiserreich" than with Austrian Catholicism.