Siegfried, Nazi command bunker in Pullach, Germany

Siegfried is a bunker complex in Pullach south of Munich comprising several fortified structures and administrative buildings across an expansive secured site. The facility includes both underground chambers and above-ground buildings that served different purposes throughout its operational periods.

The site was constructed in the early 1940s and initially served as a command installation during World War II. After 1945 it underwent several transformations in function, eventually becoming an intelligence agency headquarters for much of the late 20th century.

The bunker's codename was "Hagen", while the surrounding estate built from 1936 was called Reichssiedlung Rudolf Heß. From 6 December 1947 the Organisation Gehlen moved in, and on 1 April 1956 the grounds became part of the BND site in Pullach, which remained the federal intelligence service's seat until 8 February 2019. The metal doors in the concrete portal still carry a faint painted X with a horizontal line.

The site is not open to free public access and requires special permission for visits. Potential visitors should check in advance what sections might be accessible and how to arrange an authorized tour.

Hitler never used the bunker built for him; in summer 1943 Field Marshal Erwin Rommel prepared the German invasion of Italy from here. The complex was codenamed "Hagen", and a Führerbunker still survives within it.