Great Seal of the United States
Overview
 
The Great Seal of the United States is used to authenticate certain documents issued by the United States federal government
Federal government of the United States
The federal government of the United States is the national government of the constitutional republic of fifty states that is the United States of America. The federal government comprises three distinct branches of government: a legislative, an executive and a judiciary. These branches and...

. The phrase is used both for the physical seal
Seal (device)
A seal can be a figure impressed in wax, clay, or some other medium, or embossed on paper, with the purpose of authenticating a document ; but the term can also mean the device for making such impressions, being essentially a mould with the mirror image of the design carved in sunken- relief or...

 itself (which is kept by the United States Secretary of State
United States Secretary of State
The United States Secretary of State is the head of the United States Department of State, concerned with foreign affairs. The Secretary is a member of the Cabinet and the highest-ranking cabinet secretary both in line of succession and order of precedence...

), and more generally for the design impressed upon it. The Great Seal was first used publicly in 1782.

The obverse of the great seal is used as the national coat of arms
Coat of arms
A coat of arms is a unique heraldic design on a shield or escutcheon or on a surcoat or tabard used to cover and protect armour and to identify the wearer. Thus the term is often stated as "coat-armour", because it was anciently displayed on the front of a coat of cloth...

 of the United States. It is officially used on documents such as United States passport
United States passport
United States passports are passports issued to citizens and non-citizen nationals of the United States of America. They are issued exclusively by the U.S. Department of State. Besides issuing passports , also limited use passport cards are issued by the same organization subject to the same...

s, military insignia
Insignia
Insignia or insigne pl -nia or -nias : a symbol or token of personal power, status or office, or of an official body of government or jurisdiction...

, embassy
Diplomatic mission
A diplomatic mission is a group of people from one state or an international inter-governmental organisation present in another state to represent the sending state/organisation in the receiving state...

 placard
Placard
A placard is a notice installed in a public place, like a small card, sign, or plaque. It can be attached to or hung from a vehicle or building to indicate information about the vehicle operator or contents of a vehicle or building.- Buildings :...

s, and various flags
Flags of the United States
-Historical progression of designs:Since 1818, a star for each new state has been added to the flag on the Fourth of July immediately following each state's admission...

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