More high waists

You always find more when you start looking for something :)

Buonamico Buffalmacco, from the Baptistry of the Duomo in Parma 1330s (wikimedia has a really large photo,it's worth to check out the details).

The sleeves on both the tunic and the surcoat and the front of the surcoat are the same pink fabric with blue pattern, though what goes under the surcoat is very intriguing - either she wears a patterned apron under the gown or her tunic has a broad patterned stripe.

On teh frescoes in the church of St. Ursula in Vigo di Cadore, in the Veneto there are quite a few dresses with extremely high "waists" (more like a yoke almost), from the middle of the 14th century. However, Andrea Carloni who has taken photos of them doesn't want them shared, so I'll just give you a link to his Flickr account.

Lorenzo Venetiano, the birth of John the Baptist, the girl in pink:

I also think that it looks like St.Anne has a seam decorated with trim rather than a belt in this fresco by Giotto: