I am only a quarter of a way through Anna Karenina - I made a bet with a certain professional muse that I would give away all my books unless I finish it before she does War and Peace and look set to lose them - but I've already learned a considerable number of new words. Those Russian gentry were extremely civilized and spoke several languages as well as being careful to keep abreast of everything happening in science and culture - so much so that I've been shamed into trying to learn Russian.

Anna Karenina was Tolstoy's second novel (actually, he claimed that War and Peace was not a novel but something different and unique, with which I have sympathy.) He wrote and set it in the 1870s, the Russia of his own lifetime, rather than the historical period of War and Peace, however the milieu is much the same; decadent Petersburg aristocrats are contrasted with earthy, existentialising country squires and Muscovites. Personally, I like all of them.
Here are the words and phrases. Languages marked as following: G for German, E for English, F for French, R for Russian, I for Italian.
Kammerjunker (G) - gentleman of the bedchamber
Zertsalo (R) - a three-faced glass pyramid bearing an eagle and certain edicts of Peter the Great that stood in every government office
Zemstvo (R) - an elective provincial council for dealing with local administration
Shchi (R) - cabbage soup
Kasha (R) - buckwheat gruel
Macedoine de fruits (F) - stewed fruit
Cachet (F) - seal
Muzhik (R) - a Russian peasant
Bezique (F) - card game
Belle-soeur (F) - sister in law
Claras (presumably international) - whores
Tant mieux (F) - all for the better
Filer (F) - to spin or run
Dirigeur (F) - director
Bijou (F) - jewel
Galoshes (E) - waterproof overshoes
Entendons-nous (F) - let's understand each other
Samovar (R) - Russian tea-urn
Chignon (F) - knot or coil of hair at the back of a woman's head
Diable rose (F) - pink devil
Majolica (I) - Italian Renaissance tin-glazed etchings telling stories
Bouffe (F) - comic opera
Beadle (E) - church or synagogue usher
Rambouillet (F) - famous literary salon