Sigismund III Vasa

One of the polish kings I really do not like was Sigismund III Vasa. This guy was under strong influence of the Counterreformation and it was his idea to attack Russia (1605-1618), mainly because Russia was orthodox and so independent from the Pope. He gave exclusive rights to the polish catholics and provoked a war with Sweden. His reign was the initial of the polish XVII century, which led to the decline of the country.