Among the objects of the heroic history of the defence of Stalingrad is the building (one of three) that it was decided not to rebuild after the war. It is often mistakenly called "Pavlov's House". In fact it ruined Mill No. 4 or better known as the Mill Gerhard – the great monument of the battle of Stalingrad, part of the same panorama Museum along with the Pavlov's House.

The mill building was built in Tsaritsyn (now Volgograd) in 1903 the Volga German A. Gerharda. In those days it was a unique building for the city. Visible from the street, a dilapidated brick wall covering for powerful concrete frame. Partially survived staircases made of concrete. What power was needed to accommodate heavy industrial metal equipment.

Reliable concrete construction helped the building survive the devastating Stalingrad and to survive until the present day. The owner of the mill Alexander Gerhard (1864-1933) after the October revolution not only lost their property but also life in the dungeons of the GPU, who was arrested as a hostage for the arrested in the German revolutionary Karl Radek. In 30-ies of the building was called the Mill Grudinina in memory of the Secretary of a party cell Konstantin Grudinin, who worked as a Turner at the mill and died in 1922.

The mill Gerhard or Grudinina ceased its operation on 14 September 1942 after a direct hit by bombs and fire. The surviving workers were evacuated. The building was impregnable to the enemy fortress with metre thick walls, keeping still visible traces of the severe artillery fire. Prior to 1980, was available to the tourists. Now it is a symbol of mourning for the dead and a monument to the heroism of the defenders of the city.