Anambassador is an official envoy, especially a high-rankingdiplomat who represents a state and is usually accredited to another sovereign state or to aninternational organization as the resident representative of their own government or sovereign or appointed for a special and often temporary diplomatic assignment.^[1] The word is also used informally for people who are known, without national appointment, to represent certain professions, activities, and fields of endeavor, such as sales.

An ambassador is the ranking government representative stationed in a foreign capital or country. The host country typically allows the ambassador control of specific territory called anembassy (which may include an official residence and an office,chancery, located together or separately, generally in the host nation's capital), whose territory, staff, and vehicles are generally affordeddiplomatic immunity in the host country. Under theVienna Convention on Diplomatic Relations, an ambassador has the highestdiplomatic rank. Countries may choose to maintain diplomatic relations at a lower level by appointing achargé d'affaires in place of an ambassador.

The equivalent to an ambassador exchanged among members of theCommonwealth of Nations are known asHigh Commissioners. The ambassadors of theHoly See are known as ApostolicNuncios.

The term is derived from Middle Englishambassadour, Anglo-Frenchambassateur; akin to Old High Germanambaht, "service". The first known usage of the term was recorded around the 14th century.

The foreign government to which an ambassador is assigned must first approve the person. In some cases, the foreign government might reverse its approval by declaring the diplomat apersona non grata, i.e. an unacceptable person. This kind of declaration usually results in recalling the ambassador to their home nation. In accordance with the Congress of Vienna of 1815 and the 1961Vienna Convention on Diplomatic Relations, the ambassador and embassy staff are granted diplomatic immunity and personal safety while living abroad.^[2][3]

Due to the advent of modern technologies, today's world is a much smaller place in relative terms. With this in mind, it is considered important that the nations of the world have at least a small staff living in foreign capitals in order to aid travelers and visitors from their home nation. As an officer of the foreign service, an ambassador is expected to protect the citizens of their home country in the host country.^[4][3]

Another result of the increase in foreign travel is the growth of trade between nations. For most countries, the national economy is now part of theglobal economy. This means increased opportunities to sell and trade with other nations. When two nations are conducting a trade, it is usually advantageous to both parties to have an ambassador and perhaps a small staff living in the other land, where they act as an intermediary between cooperative businesses.^[4][3]

One of the cornerstones of foreign diplomatic missions is to work for peace. This task can grow into a fight against international terrorism, the drug trade, international bribery, and human trafficking. Ambassadors help stop these acts, helping people across the globe. These activities are important and sensitive and are usually carried out in coordination with the Defense Ministry of the state and the head of the nation.^[4][3]

Also before the rise of modern diplomatic relations, sovereign states - which traded with each other, went to war and made peace – had the need for diplomatic relations, which took various forms. For example, the city states ofClassical Greece used the system ofProxeny, whereby a Proxenos – who was a citizen of the host city rather than of the city whose interests he promoted - fulfilled some of the functions given to modern Ambassadors and Consuls.

The rise of the modern diplomatic system was a product of theItalian Renaissance (from around AD 1300). The use of ambassadors became a political strategy in Italy during the 15th century. The political changes in Italy altered the role of ambassadors in diplomatic affairs. Because many of the states in Italy were small, they were particularly vulnerable to larger states. The ambassador system was used to disperse information and to protect the more vulnerable states.

This practice then spread to Europe during theItalian Wars. The use and creation of ambassadors during the 15th century in Italy has had long-term effects on Europe and, in turn, the world's diplomatic and political progression. Europe still uses the same terms of ambassador rights as they had established in the 16th century, concerning the rights of the ambassadors in host countries as well as the proper diplomatic procedures. An ambassador was used as a representative of the state in which they are from to negotiate and disseminate information in order to keep peace and establish relationships with other states. This attempt was employed in the effort to maintain peaceful relations with nations and make alliances during difficult times.

The use of ambassadors today is widespread. States andnon-state actors use diplomatic representatives to deal with any problems that occur within the international system. Ambassadors now normally live overseas or within the country to which it is assigned for long periods of time so that they are acquainted with the culture and local people. This way they are more politically effective and trusted, enabling them to accomplish goals that their host country desires.

TheCongress of Vienna of 1815 formalized the system ofdiplomatic rank underinternational law, distinguishing between three hierarchical descending categories of diplomatic representatives: full ambassadors (including legates ornuntii), accredited to heads of state; envoys or ministers, who were also accredited to heads of state; and finally chargés d’affaires, who were accredited tominister of foreign affairs.^[5]

TheVienna Convention on Diplomatic Relations of 1961, which took effect in 1964 and is still in force, modified the system. According to it, ambassadors are diplomats of the highest rank, formally representing their head of state, withplenipotentiary powers (i.e. full authority to represent the government). In modern usage, most ambassadors on foreign postings ashead of mission carry the full title of Ambassador Extraordinary and Plenipotentiary. The distinction between extraordinary and ordinary ambassadors was common when not all ambassadors resided in the country to which they are assigned, often serving only for a specific purpose or mission.^[6]

Theambassador extraordinary and plenipotentiary being historically regarded as the personal representative of the sovereign, the custom of dispatching ambassadors to the head of state rather than the government has persisted. For example, ambassadors to and from theUnited Kingdom are accredited to or from the RoyalCourt of St James's. Ambassadors hold the highestdiplomatic rank and have precedence overchargés d'affaires, who are accredited by theforeign minister. Ambassadors also outrankedenvoys until the 1960s, when the last legations were upgraded to embassies.

Because members of theCommonwealth of Nations have or had a common head of state, they do not exchange ambassadors, but instead haveHigh Commissioners, who represent the government, rather than the head of state. The diplomat representing theHoly See is titled anuncio. In diplomatic usage, both the high commissioner and nuncio are considered equivalent in rank and role to an ambassador; high commissioners, like ambassadors, carry the full title of "High Commissioner Extraordinary and Plenipotentiary",^[7][8][9] but nuncios do not. Resident Coordinators within the United Nations system are accredited to the Head of State and have the same rank as ambassador.

Ambassadors carry formalletters of credence from theirhead of state, addressed to the host country's head of state. Because many Commonwealth countries have the same head of state, the accreditation of a High Commissioner is in the form of a simple and often informal letter of introduction from onehead of government (Prime Minister) to that of another. The difference in accreditation is also reflected in the formal titles of envoys to foreign and Commonwealth states: e.g., British High Commissioners are formally titled "The High Commissioner forHis Majesty's Government in the United Kingdom", whereas British Ambassadors to foreign countries are known as "His Britannic Majesty's Ambassador".^{[citation needed]}

An ambassador-at-large is a diplomat of the highest rank or a minister who is accredited to represent their country. But unlike the ambassador-in-residence, who is usually limited to a country orembassy, the ambassador-at-large can be appointed to operate in several usually neighbouring countries, a region or sometimes a seat of international organizations such as the United Nations or European Union. In some cases, an ambassador-at-large may even be specifically assigned a role to advise and assist the state or government in particular issues.

Historically, presidents or prime ministers have commissioned special diplomatic envoys for specific assignments, primarily overseas but sometimes also within the country as ambassadors-at-large.

While the title generally reflects the ambassador's second head position as head of a diplomatic mission, in some countries the term may also represent a rank held by career diplomats, as a matter of internal promotion, regardless of the posting, and in many national careers it is quite common for them to be appointed to other functions, especially within the ministry/ministries in charge of foreign affairs, in some countries in systematic alternation with actual postings.The formal form of address for an ambassador is generally the form that would be used to address a head of state: "(Your/His/Her)Excellency" followed by name or the country represented. In many countries, less formal variations are frequently used, such as "Ambassador" followed by name, or the name followed by "Ambassador of...". In theUnited States, "Mister/Madam Ambassador" may be used.

In some countries, a former ambassador may continue to be styled and addressed as ambassador throughout their life (in the United States, "Mr. Ambassador" or "Madam Ambassador" may be heard). In other countries, ambassador is a title that accrues to its holder only with respect to a specific position, and may not be used after leaving or beyond the position. Some countries do not use the term while an ambassador is in the home country, as the officeholder is not an ambassador there; for example, a Canadian ambassador while in Canada is not generally addressed as ambassador, although they may be referred to as "Canadian ambassador to ..."; that is, with reference to a specific job function; the person is addressed or styled as ambassador only while holding such office.

In a less formal sense, the phrase is used for high-profile non-diplomatic representatives of various entities (rarely states), mainly cultural and charitable organizations, often as willing figureheads to attract media attention; for example, film and pop stars make appeals to the public at large forUnited Nations activities, sometimes during press-swarmed visits in the foreign country. Public figures are sometimes nominated or invited to endorse events designated as ambassadors, brand ambassadors, andgoodwill ambassadors.

Many times, international agencies like United Nations also appoint ambassadors to achieve the objectives of a particular mission, like the appointment of goodwill ambassador Bollywood film actress Priyanka Chopra forUNICEF.^[10] Japan adopted the cartoon characterHello Kitty as their official goodwill and tourism ambassador to China and Hong Kong in 2008.^[11] According to Brain, the job of a brand ambassador was undertaken typically by a celebrity or someone of a well-known presence, who was often voluntary or paid considerably for their time and effort.^[12] In French-speaking regions such as metropolitanFrance,Guadeloupe,Réunion,Quebec, orWallonia, the title ofambassadeur personne is used.

Further, in the United States of America, senior career officers of theU.S. Foreign Service may be appointed by the President, by and with the advice and consent of the Senate, to the rank ofCareer Ambassador as professional achievement. Holders of this rank may not necessarily possess diplomatic authority or accreditation to any state, though nearly all have previously served as an Ambassador Extraordinary and Plenipotentiary during their careers. By custom, they hold the rank for life (including retirement), are addressed with the titleAmbassador and may useU.S. Diplomatic Passports for all travel. Prominent career ambassadors includeLawrence Eagleburger,William Joseph Burns andRyan Crocker.

• Chargé d'affaires
• Consul (representative)
• Lists of ambassadors
• Diplomacy
• Diplomatic rank
• Goodwill ambassador

• Rana, Kishan (2003).The 21st Century Ambassador: people who are very important. Oxford University Press. Archived fromthe original on 7 May 2020. Retrieved10 December 2019.

• Ambassador –Merriam-Webster
• "The Ambassador's Role".UCLA. Archived fromthe original on 12 January 2014.
• Phillips, Walter Alison (1911)."Ambassador" .Encyclopædia Britannica. Vol. 1 (11th ed.). pp. 791–792.