Pfeifer-Gericht (n)
(with) definite article: dasofficial gathering of a guild, or similar organisation, of musicians
Literally: (the) Pipers' Court(s); From the title of Johann Henrich Hermann Fries' »Abhandlung vom sogenannten Pfeifer-Gericht...« (Frankfurt am Main, 1752); Probably only a part of the proceedings.
Spruit, Mr. J.E.: Van vedelaars, trommers en pijpers. Utrecht, 1969, p.86*, 87 [caption] (»Fries).