Luca Marenzio
In 1587 he moved to Florence where he worked for Ferdinando I de' Medici for two years; in 1589 he returned to Rome, where he spent most of his last years, except for a trip to Poland from 1596 to 1597, during which time he worked at the court of Sigismund III Vasa in Warsaw.  It seems from what some people wrote that his trip to Poland ruined his health, and he died in Rome in 1599, shortly after returning from Poland.