The ancient Silk Road trade routes across Eurasia.
The field of international relations dates from the time of the Greek historian Thucydides.
The official portraits of King Władysław IV dressed according to French, Spanish and Polish fashion reflects the complex politics of the Polish–Lithuanian Commonwealth during the Thirty Years' War.
Empires of the world in 1910
NATO International Security Assistance Force in Afghanistan
The United Nations Secretariat Building at the United Nations headquarters in New York City
The World Bank headquarters in Washington, D.C.
NATO E-3A flying with USAF F-16s in a NATO exercise

However, in addition to political science, it draws considerably from international economics, law, and world history, leading some academic institutions to characterize it as an independent or multidisciplinary field.

- International relations

International political economy, a sub-category of international relations, studies issues and impacts from for example international conflicts, international negotiations, and international sanctions; national security and economic nationalism; and international agreements and observance.

- International economics

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