The Gothenburg University Library has digitized several years of sheet music from a publication called Musikaliskt Tidsfördrif (“Musical pastime”). The first issue from 1790 contains a short Polonaise. I transcribed it in MuseScore and generated an audio file.
It may be the first time it is played for two hundred years or so. You can listen to it here:
Download the sheet music and mp3 file below. Both are Public Domain.