The residents received Receiving the apartments in exchange for their destroyed Destroying ones , an arrangement set up by the city-held `` OAO Residential Investment Company of the City of Kazan '' and supported Supporting by Kazan mayor Ilsur Metshin and the district administration .

The Siege of Pirna ( or Investment of Pirna ) took place Process_start in 1756 as part of the Prussian invasion Attack of Saxony during the Third Silesian War ( part of the Seven Years ' War ) .