Regelbau

thumb|Examples of Regelbau designs that were used in the construction of the Neckar-Enz position The Regelbau (German for "standard(ised) construction") were a series of standardised bunker designs built in large numbers by the Germans in the Siegfried Line () and the Atlantic Wall as part of their defensive fortifications prior to and during the Second World War.

== Purpose == There were several advantages to standardising the design and construction: Retention of proven design features when building new bunkers Simpler manufacture of large quantities e.g. of armoured and ventilation components and simplified ordering from the industrial manufacturers involved Easier surveying of construction sites with regard to the tactical situation Simplified construction process Easier supply of materials to the construction site