The Siberian is the third of the look-alike triangle of Maine Coon, Norwegian Forest Cat and Siberian. Indeed, several registries were reluctant originally to accept the Siberian for that very reason. According to a Cats and Kittens article, breeders used the argument that "[Siberians] are a constellation of circles and curves, while Maines are a confederation of rectangles, and Norwegians are triagular in theme." The CFA provisional standard for the Siberian makes mention of those differences.
Siberians are said to have been taken originally from Russia to Siberia, where they developed their thick protective coats against the harsh winters; then, ultimately brought back to Russia where they were bred, primarily in Leningrad and Moscow. This will have to remain a legend, as no substantial proof seems to have been offered of these events.
Regardless of their origin, Siberians are glorious cats, with personality-plus, which qualifies them as an all-around good candidate for a pet.
Breed Brief:
Body: Substantial with a medium length back which is very slightly curved or arched, a convex muscular torso, and a round compact belly.
Coat: Plush, medium length coat, with hair on the shoulder blades and lower part of the chest being thick and slightly shorter, and a neck ruff. The coat texture may vary according to colors, which are allowed in a profusion of shades and patterns.