A Newly Found Source of Jacobus Handl-Gallus’s Mass Compositions and Other Traces of Reception of His Music in Seventeenth-Century Royal Prussia

Evidence of the reception of Jacobus Handl-Gallus’s music in seventeenth-century Royal Prussia comes from sources produced both in Protestant environments, particularly in Gdańsk and Elbląg, and in Catholic colleges, monasteries and convents. In this article they are brought together and supplemented by sources of newly identified compositions and also sources from a manuscript not previously the subject of research.