This is the "Antique Room" at the Arkhangelskoye Palace, ca. 1780s-1810s located not far outside of Moscow. It is a popular tourist destination and I read that it took some fifty years to build and decorate.
It looks like a lovely building done in the classical style.
The stamp on the flip side is from the Kremlin series. I've received this stamp before, and you can see it here.
{RU-1064357}
Postcrossing card #86