1) The Westphalian Peace Treaty was signed in 1648.

2) Westphalian sovereignty is based on the principles of territorial integrity and political independence.

3) The Westphalian system established the state as the primary unit of international relations.

4) The concept of Westphalian order has influenced modern theories of international relations.

5) The Westphalian state system is characterized by its emphasis on national sovereignty.

6) The Westphalian model of governance has been criticized for its exclusionary nature.

7) The Westphalian nation-state emerged as a dominant political form in the 17th century.

8) The Westphalian system has shaped contemporary notions of statehood and diplomacy.

9) Westphalian diplomacy emphasizes negotiations and treaties to resolve conflicts.

10) Modern international organizations often challenge the Westphalian principles of state sovereignty.