The Kokoshnik 

(From Russian Vogue) 

Kokoshniks were worn as early as in 10th-12th century and had quite a history since then. Together with other elements of traditional Russian costume they were banned by Peter the Great in order to modernize Russian social system, but only a few decades later Catherine the Great brought them back and officially made part of court dress. It is interesting that Catherine wasn’t  born Russian but there was hardly any ruler ever who would have done more for Russia.

 Russian Fashions