From the airport "Pulkovo": take a municipal bus to the closest metro station "Moskovskaya", then go by metro to "Nevsky Prospect" station.

From any train station: go to the nearest metro station (all train stations are above or very close to metro stations), then take a metro train to "Nevsky Prospect".

From metro station "Nevsky Prospect" You should go 200 meters walk to Bolshaya Konushennaya street, then turn right and go 200 meters walk to 11 building.