The crowns of the Zodiac

[Koen G]

But there are crowns in three months. And why represent the actual monarchy by a naked female figure wearing just a crown? Why mark the crown so visibly while the other figures in this circle are relatively plain? She really stands out. Probably tax month (if such a thing existed) was very important, but then why did it have to be marked in this strange way? Supposedly anyone running a business knew when taxes were collected.

Now it is true that the three crowns are different and they need an explanation. Since each of them appear in similar contexts (one crowned nymph in a circle without many further attributes) their purpose might be similar as well.