From Wikipedia:

http://en.wikipedia.org/wiki/Swastika

The swastika (from Sanskrit स्वस्तिक svastika) is an equilateral cross with its arms bent at right angles in either left-facing (d) or right-facing (e) direction. The swastika is a holy symbol in Hinduism, Jainism and Buddhism. In the West, it is most widely known and used as a symbol of Nazism. It is traditionally oriented so that a main line is horizontal, though it is occasionally rotated at forty-five degrees. The Hindu version is often decorated with a dot in each quadrant.

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