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The United Nations, with its headquarters in New York City, is the largest international diplomatic organization.
The field of international relations dates from the time of the Greek historian Thucydides.
Ger van Elk, Symmetry of Diplomacy, 1975, Groninger Museum.
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.
The Egyptian–Hittite peace treaty, between the New Kingdom of ancient Egypt and the Hittite Empire of Anatolia
Empires of the world in 1910
stone tablet fragments
NATO International Security Assistance Force in Afghanistan
A French ambassador in Ottoman dress, painted by Antoine de Favray, 1766, Pera Museum, Istanbul.
The United Nations Secretariat Building at the United Nations headquarters in New York City
Portraits of Periodical Offering, a 6th-century Chinese painting portraying various emissaries; ambassadors depicted in the painting ranging from those of Hephthalites, Persia to Langkasuka, Baekje(part of the modern Korea), Qiuci, and Wo (Japan).
The World Bank headquarters in Washington, D.C.
India's Diplomatic Personnel
NATO E-3A flying with USAF F-16s in a NATO exercise
Omurtag, ruler of Bulgaria, sends delegation to Byzantine emperor Michael II (Madrid Skylitzes, Biblioteca Nacional de España, Madrid).
French diplomat Charles Maurice de Talleyrand-Périgord is considered one of the most skilled diplomats of all time.
The First Geneva Convention (1864). Geneva (Switzerland) is the city that hosts the highest number of international organizations in the world.
Frontispiece of the Acts of the Congress of Vienna.
Brazilian President Prudente de Morais shakes hands with King Carlos I of Portugal during the re-establishment of diplomatic relations between Brazil and Portugal after talks mediated by Queen Victoria of the United Kingdom, 16 March 1895.
Anton von Werner, Congress of Berlin (1881): Final meeting at the Reich Chancellery on 13 July 1878.
Celebrating the signing of the Camp David Accords: Menachem Begin, Jimmy Carter, Anwar El Sadat
Czech (originally Czechoslovak) Embassy in Berlin.
The ministers of foreign affairs of the United States, the United Kingdom, Russia, Germany, France, China, the European Union and Iran negotiating in Lausanne for a Comprehensive agreement on the Iranian nuclear programme (30 March 2015).
The Diplomatic Academy of the Ministry of Foreign Affairs of the Russian Federation at 53/2 Ostozhenka Street in Moscow.

It examines all activities between states—such as war, diplomacy, trade, and foreign policy—as well as relations with and among other international actors, such as intergovernmental organisations (IGOs), international nongovernmental organisations (INGOs), international legal bodies, and multinational corporations (MNCs).

- International relations

International treaties, agreements, alliances, and other manifestations of international relations are usually the result of diplomatic negotiations and processes.

- Diplomacy
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2 related topics

Alpha

J. K. Paasikivi, the President of Finland, was remembered as a main architect of Finland's foreign policy with the Soviet Union after the Second World War. From left to right: President Paasikivi and Soviet head of state Kliment Voroshilov in Moscow.

Foreign policy

Its objectives and activities in relation to its interactions with other states, unions, and other political entities, whether bilaterally or through multilateral platforms.

Its objectives and activities in relation to its interactions with other states, unions, and other political entities, whether bilaterally or through multilateral platforms.

J. K. Paasikivi, the President of Finland, was remembered as a main architect of Finland's foreign policy with the Soviet Union after the Second World War. From left to right: President Paasikivi and Soviet head of state Kliment Voroshilov in Moscow.

The idea of long-term management of relationships followed the development of professional diplomatic corps that managed diplomacy.

Although originally intended to describe short term management of a specific concern, these departments now manage all day-to-day and long-term international relations among states.

The Hittite version of the Treaty of Kadesh, among the earliest extant examples of an international agreement.

International law

Set of rules, norms, and standards generally recognized as binding between nations.

Set of rules, norms, and standards generally recognized as binding between nations.

The Hittite version of the Treaty of Kadesh, among the earliest extant examples of an international agreement.
Hugo Grotius' De jure belli ac pacis, is considered one of the foundational texts of international law. (Pictured is the title page from the second edition of 1631).
A portrait of the Dutch jurist Hugo Grotius (alias Hugo de Groot)
Sir Alberico Gentili is regarded as the Father of international law.
The First Geneva Convention (1864) is one of the earliest formulations of international law

As D. W. Greig notes, "international law cannot exist in isolation from the political factors operating in the sphere of international relations".

If addressed, it may be through diplomacy and the consequences upon an offending state's reputation, submission to international judicial determination, arbitration, sanctions or force including war.