Toward the end of the 1600s, before the instrument even looked like it does today, Gaspar Sanz and others wrote guitar music in upside-down tablature (top lines represent bass strings). I wrote out three pieces from Sanz’s instruction manual about 20 years ago and have recently rewritten them using MuseScore. You can see them
here, along with scans of the original upside-down tablature from 1675.