Quote:
[=stuwm]your picture seems to be a crown, which this thing cap doesn't seem to be except for the 'crown of the head' part. OED does contain this note, which I don't find to be very helpful: (The two crowns [? of England and France] with which the bycoket of Henry VI was ‘garnished’ or ‘embroidered’, were, of course, no part of the ordinary bycoket.)
edit: here's an illlustration: link
Yeh, it quite a silly King's bonnet but the word did exist in all its nonexistingness in that tekraszjne language.
Nice costume site!(link)