Based on the collar, I would put it in the first half of the 17th century (just after the ruffed collar).
Bust is a lot like that of Sigismund III of Poland-Lithuania, but I don;t recall a type like that. Gustavus Adolphus of Sweden had a very similar portrait (they were cousins) so you could look there, too.
Edited by tdziemia
Today 14H 15M ago