What is westphalia contract and its contexts?

Question

I just know that it concluded in 1648 and its about to create state_nations.

Answer 1

The term Peace of Westphalia refers to the two peace treaties of Osnabrück and Münster, signed on May 15 and October 24 of 1648 respectively, which ended both the Thirty Years' War in Germany and the Eighty Years' War between Spain and the Netherlands.

The Peace of Westphalia resulted from the first modern diplomatic congress and initiated a new order in central Europe based on the concept of national sovereignty. Until 1806, the regulations became part of the constitutional laws of the Holy Roman Empire.