I recently finished this balzo. It was an easy make, but sewing all the little beads on took quite a long time.
Construction is relatively simple; make a long fabric tube big enough to go around your head and allow ease and add about an inch/2.5cm extra on each end (this is to allow for the end to be turned under).
Turn the end of one end of the tube under and pin it over the other end, creating a donut shape. Pin securely. Try it on to make sure it fits. Adjust if necessary, and hand sew the opening securely closed.
Next, you are going to use the donut as a pattern for the lid. There are hats like this which are just the donut shape, but I prefer the covered sort to protect from scalp sunburn.
Using a large piece of wrapping paper or old sheet etc, cut out the rough shape of the donut leaving about 5cm extra all the way around. We are aiming to cut out a lid shape.
Put the lid shape toile over the donut to make sure it will fit, and that there is enough fabric to turn a hem under. Make any adjustments necessary and then cut out your fashion fabric.
Hand sew the 'lid' onto the donut, turning a hem under as you go. You don't want it drum tight; there should be a little bit of ease as the lid will sit against the back of your head/hair.
Add trims as desired.
This particular balzo was inspired by this portrait below:
'Portrait of a Lady with a G*psy' by the Italian School, 15th CBut there are many similar ones to be seen in portraiture from the sixteenth century, including this one:
Vincenzo Pagani (1490-1568) - Annunciation (1532) - Palazzo Ducale Urbino - Galleria Nazionale delle Marche, image found via: //au.pinterest.com/pin/1337074878802655/