Bunker Kossa-Söllichau, Military museum in Laußig, Germany

Bunker Kossa-Söllichau is a former East German military command post in the Dübener Heide, built 1976–1979 from six prefabricated FB-75 bunkers of protection class E, plus smaller FB-3 bunkers and vehicle shelters. The bunkers stand separately with no underground tunnels between them; each had a distinct role such as command staff rooms, communications centre, or supply technology.

Built from 1976 to 1979 as project no. 16/13/302 by NVA engineer units and specialised East German firms, the site served as a leadership post of Territorial Military District III. Its task was to prepare and organise the formation of replacement and training brigades for the southern districts of the GDR. A small maintenance unit kept it ready for occupation; after reunification the Bundeswehr handed the area over for private use in 1993.

The site opened as a museum in 2002, the same year it received cultural monument status, after the Bundeswehr released the area for private use in 1993. Volunteers secured and maintained the surviving bunkers. Several thousand visitors come to the Dübener Heide each year, and guided tours explain the site's actual role.

The interior remains cool year-round due to its underground location with minimal natural light. Visitors should bring warm clothing and allow sufficient time to explore the facility thoroughly.

The six FB-75 prefabricated bunkers had no underground connection between them; personnel moved above ground between separate structures. The site also included smaller FB-3 bunkers for guard and maintenance staff and numerous splinter-protection covers for parked vehicles. Its communications centre was designated Auxiliary Communications Centre 63 (HNZ 63).