Which was an important result of the thirty year war?

An important result of the Thirty Years' War was the Peace of Westphalia in 1648, which marked the end of the conflict and significantly altered the political landscape of Europe. The treaties established a new framework for national sovereignty, recognizing the rights of states to govern themselves without external interference. Additionally, the war led to a decline in the power of the Holy Roman Empire and strengthened the authority of France and Sweden. It also resulted in significant territorial and demographic changes, as well as a shift in the balance of power among European nations.