Kupferbach (Tannbach)

The Kupferbach, also frequently referred to as Tannbach, is a stream that forms a portion of the border between Bavaria, Germany, and Bohemia, Czech Republic. Historically, the region was entirely within the Kingdom of Bohemia and later Austria-Hungary, until the formation of Czechoslovakia after World War I. The specific course of the Kupferbach/Tannbach became a significant factor in defining the German-Czechoslovakian border, and later the German-Czech border, particularly after World War II. The brook's relatively small size belies its historical and political importance in delineating national territories. The term "Tannbach" is sometimes used more broadly to refer to the entire border area in this region. The exact location and demarcation functions of the Kupferbach/Tannbach can be complex and have been subject to minor adjustments over time. The river's name reflects local geographical features; "Kupfer" means copper in German, suggesting historical copper deposits or working in the area. "Tann" refers to fir trees, which are common in the region.