A network for historic guitars and vihuelas
It must have a sound hole of some sort. I am no expert but my vihuela has the sound hole cut directly into the table in a geometrical pattern.
My baroque guitar - which is a much nicer instrument - has an elaborate parchment rose built up in layers. Just looking through my collection of CDs of various luminaries playing the vihuela, a simpler rose seems to be de rigeur although in some cases this may be cut flat out of parchment rather than cut into the table. A sotr of cross between the lute and baroque guitar.