Here is a few pictures, I dare not put them into the question or I will be flagged. Is this architectureal style an original?

It looks like the head of an erect penis.

An onion dome (Russian: луковичная глава, lúkovichnaya glava) is a type of architectural dome usually associated with Russian Orthodox churches. Such a dome is larger in diameter than the drum it is set upon and its height usually exceeds its width. These bulbous structures taper smoothly to a point, and strongly resemble the onion, after which they are named. Art historians disagree when and why onion domes became a typical feature of Russian architecture. Byzantine churches and architecture of Kievan Rus were characterized by broader, flatter domes without a special framework erected above the drum. In contrast to this ancient form, each drum of a Russian church is surmounted by a special structure of metal or timber, which is lined with sheet iron or tiles. By the end of the nineteenth century, most Russian churches from before the Petrine period had bulbous domes. The largest onion domes were erected in the seventeenth century in the area around Yaroslavl, incidentally famous for its large onions. Quite a few had more complicated bud-shaped domes, whose form derived from Baroque models of the late seventeenth century. Pear-shaped domes are usually associated with Ukrainian Baroque, while cone-shaped domes are typical for Orthodox churches of Transcaucasia. http://en.wikipedia.org/wiki/Onion_dome

I read that there is still debate as to their origin. Some point at examples found in Byzantine architecture,like the Hagia Sophia,(first photo) though the shape is not exactly the same. Also the Taj Mahal (2nd photo), the famous landmark from India has a similar shaped dome. There's actually an interesting article here: http://en.wikipedia.org/wiki/Onion_dome