This article contains a list of flags for which the reverse (back ) is different from the obverse (front ). It includes current as well as historic flags of both nations and national subdivisions such as provinces, states, territories, cities and other administrations (including a few that are not recognized by the United Nations or whose sovereignty is in dispute). When the flag is that of a nation, the Subdivision column is blank ( — ).
The list below does not include flags for which the reverse side is congruent (identical ) nor is it a mirror image of the obverse side (horizontally flipped ). Flag sides are usually mirror copy to satisfy manufacturing constraints. Identical flags are much less common and contain an element for which a simple mirror image would be problematic, such as text (e.g. The Flag of Saudi Arabia includes the shahada, an Islamic creed; The Flag of Iraq includes the Takbir) or a geographic feature (e.g. The Flag of the United Nations included an Azimuthal equidistant projection of the earth). Flags having a truly different designs on both their sides (two-sided ) differ from the norm. The only UN-recognized nation whose present-day flag officially contains a unique image on each side is Paraguay.
Not all impression of two-sided flags are de facto two-sided because of practical manufacturing constraints or, judging from how often it was disregarded in practice, some formal concern of heraldic nature. As such it may very well be prescribed legally from the very beginning and ever ignored in practice by institutions of every type.
Many of those flags are reconstructions based on various degree of evidence.
We have very little information on ancient Moldavian and Wallachian flags. For Moldavia the most important symbol has always been the wild ox head, which is still to be found on the flag of the new Moldavian republic. In early times the red prevailed on other colours: on standards, the wild ox head appeared on the recto, while the verso represented St. George killing the dragon. It seems that this standard was adopted by Bogdan I and maintained by Stephan the Great and successors. In the following century (XIX) the blue was added. According to an 1813 document, under prince Scarlat Calimachi the princely standard was red, yellow and blue on the recto (without any symbol), while on the verso was St George riding a horse on a blue field. Another document, dated 1814, again reports a red standard. Michael II Sutu (1819-21) had a blue flag with the wild ox head on the recto and red with St George the verso. The two Moldavian flags above from the XV-XVI c. are in Bucharest museum.
Names in italics indicate non-sovereign (dependent) territories, disputed states and/or former countries.
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A flag is a piece of fabric with distinctive colours and design. It is used as a symbol, a signalling device, or for decoration. The term flag is also used to refer to the graphic design employed, and flags have evolved into a general tool for rudimentary signalling and identification, especially in environments where communication is challenging. Many flags fall into groups of similar designs called flag families. The study of flags is known as "vexillology" from the Latin vexillum, meaning "flag" or "banner".
A national flag is a flag that represents and symbolizes a given nation. It is flown by the government of that nation, but can also be flown by its citizens. A national flag is typically designed with specific meanings for its colours and symbols, which may also be used separately from the flag as a symbol of the nation. The design of a national flag is sometimes altered after the occurrence of important historical events.
Constrained writing is a literary technique in which the writer is bound by some condition that forbids certain things or imposes a pattern.
The Great Seal is the seal of the United States. The phrase is used both for the impression device itself, which is kept by the United States secretary of state, and more generally for the impression it produces. The obverse of the Great Seal depicts the national coat of arms of the United States while the reverse features a truncated pyramid topped by an Eye of Providence. The year of the U.S. Declaration of Independence, 1776, is noted in Roman numerals at the base of the pyramid. The seal contains three Latin phrases: E Pluribus Unum, Annuit cœptis, and Novus ordo seclorum.
The flag of Oregon is a two-sided flag in navy blue and gold with an optional gold fringe. On the front is the escutcheon from the state seal and on the reverse is a gold figure of a beaver, the state animal. Oregon is the only U.S. State to feature different designs on both sides of its flag.
The State Flag of the Union of Soviet Socialist Republics, also simply known as the Soviet flag or the Red Banner, was a red flag with two communist symbols displayed in the canton: a gold hammer and sickle topped off by a red five-point star bordered in gold. The flag's design and symbolism are derived from several sources, but emerged during the Russian Revolution. It has also come to serve as the standard symbol representing communism as a whole, recognized as such in international circles, even after the dissolution of the Soviet Union in 1991.
Flag terminology is the nomenclature, or system of terms, used in vexillology, the study of flags, to describe precisely the parts, patterns, and other attributes of flags and their display.
The national flag of the Republic of Moldova is a vertical triband of blue, yellow, and red, charged with the coat of arms of Moldova on the centre bar. The reverse is mirrored. The flag ratio is 1:2. Until further provisions, the State Flag of Moldova is used as the national flag and ensign as well; that is, civil, state and war flag and ensign.
The obverse and reverse are the two flat faces of coins and some other two-sided objects, including paper money, flags, seals, medals, drawings, old master prints and other works of art, and printed fabrics. In this usage, obverse means the front face of the object and reverse means the back face. The obverse of a coin is commonly called heads, because it often depicts the head of a prominent person, and the reverse tails.
The national flag of Armenia, also known as the Tricolour, consists of three horizontal bands of equal width, red on the top, blue in the middle, and orange on the bottom. The Armenian Supreme Soviet adopted the current flag on 24 August 1990. On 15 June 2006, the Law on the National Flag of Armenia, governing its usage, was passed by the National Assembly of Armenia.
The current design of the flag of Paraguay was first adopted in 1842. Its design, a red–white–blue triband, was inspired by the colours of the French Tricolour, believed to signify independence and liberty. The flag is unusual because it differs on its obverse and reverse sides: the obverse of the flag shows the national coat of arms, and the reverse shows the seal of the treasury. It is the only national flag worldwide that has a unique design on each side. The flag consists of the same three horizontal colours as the flag of the Netherlands, which in turn was the inspiration for the French flag. It was revised in 2013 to bring the flag towards its original design. It has a ratio of 11:20.
The United States one-dollar bill (US$1), sometimes referred to as a single, has been the lowest value denomination of United States paper currency since the discontinuation of U.S. fractional currency notes in 1876. An image of the first U.S. president (1789–1797), George Washington, based on the Athenaeum Portrait, a 1796 painting by Gilbert Stuart, is currently featured on the obverse, and the Great Seal of the United States is featured on the reverse. The one-dollar bill has the oldest overall design of all U.S. currency currently being produced. The reverse design of the present dollar debuted in 1935, and the obverse in 1963 when it was first issued as a Federal Reserve Note.
In military organizations, the practice of carrying colours, standards, flags, or guidons, both to act as a rallying point for troops and to mark the location of the commander, is thought to have originated in Ancient Egypt some 5,000 years ago. The Roman Empire also made battle standards reading SPQR a part of their vast armies. It was formalized in the armies of Europe in the High Middle Ages, with standards being emblazoned with the commander's coat of arms.
The following is a list of historical military colours, standards and guidons in different countries that do not exist today.
Vexillological symbols are used by vexillologists to indicate certain characteristics of flags, such as where they are used, who uses them, and what they look like. The symbols were created by vexillologist Whitney Smith and then adopted by the International Federation of Vexillological Associations (FIAV) in the early 1970s. Vexillologist Željko Heimer added the symbols for normal and historical in the early 1990s.
This glossary of numismatics is a list of definitions of terms and concepts relevant to numismatics and coin collecting, as well as sub-fields and related disciplines, with concise explanations for the beginner or professional.
The coins of the Rhodesian pound were part of the currency of Southern Rhodesia, which changed its name to Rhodesia, following the break-up of the Federation of Rhodesia and Nyasaland, when the Rhodesian pound replaced the Rhodesia and Nyasaland pound, which had replaced the Southern Rhodesian pound.
Medieval Bulgarian coinage were the coins minted by the Bulgarian Emperors during the Middle Ages at the time of the Second Bulgarian Empire.
The gold dinar is an Islamic medieval gold coin first issued in AH 77 (696–697 CE) by Caliph Abd al-Malik ibn Marwan. The weight of the dinar is 1 mithqal.
The Bronze Medallion, signifying a qualified lifesaver, has been a lifesaving standard award of The Royal Life Saving Society - Australia and Surf Life Saving Australia for over one hundred years. It was developed in England in 1892. It has evolved over the years to accommodate the environmental conditions of Australia.
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) is different from the obverse (front 
). It includes current as well as historic flags of both nations and national subdivisions such as provinces, states, territories, cities and other administrations (including a few that are not recognized by the United Nations or whose sovereignty is in dispute). When the flag is that of a nation, the Subdivision column is blank ( — ). 
) nor is it a mirror image of the obverse side (horizontally flipped 
). Flag sides are usually mirror copy to satisfy manufacturing constraints. Identical flags are much less common and contain an element for which a simple mirror image would be problematic, such as text (e.g. The Flag of Saudi Arabia includes the shahada, an Islamic creed; The Flag of Iraq includes the Takbir) or a geographic feature (e.g. The Flag of the United Nations included an Azimuthal equidistant projection of the earth). Flags having a truly different designs on both their sides (two-sided 
) differ from the norm. The only UN-recognized nation whose present-day flag officially contains a unique image on each side is Paraguay. 
