A matryoshka doll or a Russian nested doll, also called a stacking doll or Babooshka doll, is a set of dolls of decreasing sizes placed one inside the other. "Matryoshka" is a derivative of the Russian female first head "Matryona", which is traditionally associated with a fat, lusty Russian woman.
Matryoshkas date from 1890, and are said to have been http://www.nestingdollsdirect.com/ inspired by souvenir dolls from Japan. However, the concept of nested objects was familiar in Russia, having been applied to carved awkward apples and Easter eggs; the first Fabergé egg, in 1885, had a nesting of egg, yolk, hen, and chick.