The marriages of the King of Poland Sigismund III Vasa with Anne (1592) and subsequently her sister Constance (1605), who were descendants of the dynasty of Archdukes of Inner Austria, had many cultural consequences. The article recalls some facts on the migrations of musicians and musical repertories in both directions between Cracow (also Warsaw) and Graz at the end of the sixteenth century and during the first two decades of the seventeenth century.