The crowns of the Zodiac

[-JKP-]

The famous sculpture of Frederich III (1415-1493), emperor, was created in a century later, so there's no guarantee the crown is accurate but it is similar to this 15th-century painting (the sculptor might have used the painting as the model for the crown):



Source: Hans Burgkmair the Elder - Kunsthistorisches Museum Wien, Bilddatenbank.

Albert 1, Emperor of Germany, Duke of Austria (13th–14th century), but it's an engraving, so it was probably created a couple of centuries later (or more):