ENThe period under research spans the reigns of ive Polish kings, who were żrand Dukes of Lithuania at the same time. They were Zygmunt III Vasa (who reigned 1587-1632) followed by his sons Władysław IV (1632-48) and Jan II Kazimierz (1648-68), and also Michał Korybut Wisniowiecki (1669-73) and Jan III Sobieski (1674-96). Towards the end of the 17th century, in 1697, the irst of the two Polish kings from the Saxon Wettin dynasty ascended to the throne. These inal years of the century are already within the chronological range researched in the MusMig project by Alina Žórawska-Witkowska.