A crown can be braided as a french twist or a french or dutch braid of any number of strands you know how to braid.
Dutch braids are the same as cornrows commonly sported by black children and adults. They are worked on top of the hair, rather than underneath. A dutch crown braid combines the ease of one or two large braids with the regal look of a crown. It is a romantic style reminiscent of renaissance fairs, but which has also been sported on urban streets after R&B singer Mary J. Blige wore it as a signature style for a time.