The restoration of the facilities of the Eastern Wing of the General Staff Building is being carried out literally from the floor to the ceiling. Works are closely supervised by monument protection specialists and architects. UNESCO commission that recently visited our city reviewed the process of restoration in the General Staff Building that is carried out by the consortium of INTARSIA Group.

Special attention is paid to the restoration of the preserved decor elements of interiors. Fragments of painting are being preserved in three rooms. One of the most labor intensive works that requires ultimate precision, patience and skills is the restoration of the ceiling-painting of one of the halls located at the place where a staircase designed by Rossi was burnt in the 19th century. After the fire the staircase was not restored but the ceiling-painting was preserved beneath latest layers. Now the restorers are cleaning backgrounds and removing the said layers from the painting in order to restore the authentic look of the Empire age paintings. In another room the painting suffered even more as in the last century it was exposed to intense leakages. Using a tracing paper an artist-restorer traces over the preserved fragments and transfers an image onto another wall, thus recreating part of the lost painting with maximum precision by analogy with the preserved fragments.

Currently objects of restoration are authentic doors and door casings. Doors were removed and moved to workshops. At different restoration stages they are brought to the facility, the General Staff Building, for fitting. Sometimes a door happens to be short (or narrow) for an authentic door casing, cleaned of latest layers; in this case it has to be "extended". For this, specialists try to minimize the interference into the restored objects so that when a crack is found in a door, they would fasten it rather than replace with a new fragment.

Several dozens of tile stoves available in the building are restored on site. Tiles are carefully removed and cleaned, cracks are filled. Then tiles are treated by a special method that replaces the process of glazing in a stove as ancient tiles would not sustain the burning temperature. After removing tiles, specialists reinforce the historical brickwork. Restored parts of metallic decor will be soon placed back.

Specialists have carried out works aimed at preserving the building, with the emphasis laid on reinforcing foundations and walls. To reinforce especially problematic wall passages, an injection method was applied. Holes were made in the wall every 60 centimeters where a special reinforcing solution was pumped under high pressure.

In the fifth courtyard of the General Staff Building concrete is being poured under the Grand Staircase leading to a future museum's exposition.

In the attic of the General Staff Building an authentic Rossi's lantern light is preserved that after the restoration will be used for its intended purpose just as two centuries ago to illuminate two floors of new expositions.