To have all the russian Unesco sites i only needed a card of one of the two russian Struve Geodetic Arc points and i got it thanks to Galina. One more completed country.
This is a card of the Gogland or Hogland island, in the Gulf of Finland in the eastern Baltic Sea, about 180 km west of Saint Petersburg and 35 km from the coast of Finland.
Since 1826, the hill Mäkiinpäällys has two of the points in the Struve Geodetic Arc.
The gentleman on the card is Friedrich Georg Wilhelm von Struve, the german astronomer who initiated the Struve Geodetic Arc.