2 Pillars That Support The Square 

NATO (North Atlantic Treaty Organization) is an intergovernmental military alliance. between 28 European countries and 2 North American countries. The organization implements the North Atlantic Treaty that was signed on 4 April 1949 

The United Nations (UN) is an intergovernmental organization aiming to maintain international peace and security, develop friendly relations among nations, achieve international cooperation, and be a centre for harmonizing the actions of nations 193 member states 2 observer states