This is 19th century (Willem-Alexander), but it does have some helpful information about crowns. The later crowns in many countries were designed like the earlier (16th century) crowns of the emperors. There was definitely one-upmanship going on over the centuries. The early crowns were laurel wreaths.
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Wow, I just noticed there are a LOT more crown pictures online than there were five years ago and some of them are the actual crowns:
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A variety of crown styles. Unfortunately no dates and no info on how these were collected (did they copy museum specimens? or did they copy sculptures or manuscript images?? if so, they might be fancier than the actual crowns):
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Wow, I just noticed there are a LOT more crown pictures online than there were five years ago and some of them are the actual crowns:
You are not allowed to view links. Register or Login to view.
A variety of crown styles. Unfortunately no dates and no info on how these were collected (did they copy museum specimens? or did they copy sculptures or manuscript images?? if so, they might be fancier than the actual crowns):

