Matryoshka Doll is a set of wooden dolls of decreasing size placed one inside another.
Matryoshka seems to be a traditional Russian doll. However, it was invented at the end of 19th. century, and later presented in Paris, as an old Russian toy. Anyway, the idea was apparently quite clever, because these days, Matryoshka Doll is one of the symbols of Russia.
Matryoshka Dolls follow different themes. They may consist of “Russian women”, as well as represent characters of Soviet leaders; everything is possible. 😉