Commemorative coins are coins that were issued to commemorate some particular event or issue. Most world commemorative coins were issued from the 1960s onward, although there are examples of commemorative coins of earlier date. Such coins have a design with reference to the occasion on which they were issued. Many coins of this serve as collectors items only, although some countries are also issuing commemorative coins for regular circulation. Vast numbers of coins are continuously being issued, highlighting ancient monuments or sites, historical personalities. While such thematic coins may or may not commemorate any event or jubilee. Circulating commemoratives are intended to be used for commerce, but the design will only be issued for a time, is intended to draw some attention to a specific event or person. Examples include the €2 commemorative coins, or U. S.50 State Quarters, non-circulating legal tender are coins which are legal tender, and thus can in theory be used to purchase goods or services, but are not intended to be used in such a manner. Rather, they are intended to be used only as souvenirs, historically, the coins issued by any state have always reflected the current political or economic situation. Many ancient and pre-modern coins certainly commemorate events in contemporary times, for instance, Roman coins often have references to military campaigns and the defeat of foreign powers. These reverse types often represent the subordination of recently conquered territories to Roman authority. Such coins are examples of ancient political propaganda, the Roman Empire may be represented by a proud warrior raising an undersized figure, representing the defeated enemy. Throughout history, coins have commonly been issued on special occasions, in some cases, emergency money have been issued under unfavourable conditions, such as a city under siege. Such emergency coins were issued in Vienna in 1529, while the city was besieged by the troops of the Ottoman Empire, due to the conditions at the time, such coins are frequently minted on square flans, rather than round ones. European square coins of this era are known by their German name klippe, coins might also be issued with the specific purpose of financing a military campaign, or for the payment of tribute or war indemnity by a feudal lord to his sovereign. During recent centuries, specially prepared coins have been issued to proclaim the coronation of a new monarch, such coins are known as largesse coins. This type of coins were issued in India during the Mughal era, in Europe, such coins were scattered from the royal chariot, to achieve attention and applause from the public. In Sweden, coins of this type were issued as late as 1873, during the era of the formation of the European nation states, the issuance of special coins explicitly commemorating various events became increasingly common
The US bicentennial quarter is an example of a true commemorative coin.
Coin issued during the reign of Roman emperor Lucius Verus (161-169) to celebrate his victory against Vologases IV of Parthia. The reverse shows the mourning personification of Armenia.
Denmark two kroner coin issued in 1912 commemorating the accession in that year of king Christian X. The king’s late father, Frederik VIII is depicted on the reverse.