WH 103 is a German military bunker located near Landau in der Pfalz, Rhineland-Palatinate. The structure is partially built over by a modern music hall (Musikhalle), with the bunker's valley-facing side remaining visible. Its documented firing direction is noted as '4 Uhr' (4 o'clock), a standard German military designation for azimuth.
The site is part of the extensive Westwall (Siegfried Line) fortifications constructed along Germany's western border in the late 1930s and early 1940s. Today, the bunker serves as a historical relic of World War II-era German defensive infrastructure, with its partial integration into later civilian architecture illustrating post-war repurposing. The region was a significant sector of the Westwall, designed to defend against anticipated Allied incursions.