In the early 15th century, a crown with a cross was the symbol of the Holy Roman Emperor or the Holy Roman Empire.
There were basically "crown wars" throughout history. If you look at the progression, it was always about getting bigger and fancier and richer (e.g., gold, gems)—having something better than the previous guy.
But in manuscripts and sculptures, there were certain crowns that were recognized as being certain people (like the three-tiered hat for the pope and the round cross-topped crown for the emperor).
There were basically "crown wars" throughout history. If you look at the progression, it was always about getting bigger and fancier and richer (e.g., gold, gems)—having something better than the previous guy.
But in manuscripts and sculptures, there were certain crowns that were recognized as being certain people (like the three-tiered hat for the pope and the round cross-topped crown for the emperor).