Crowns

The heraldic symbol of Three Crowns, referring to the three evangelical Magi (wise men), traditionally called kings, is believed thus to have become the symbol of the Swedish kingdom, but it also fits the historical (personal, dynastic) Kalmar Union (1397-1520) between the three kingdoms of Denmark, Sweden and Norway.
Numismatics
Because one or more crowns, alone or as part of a more elaborate design, often appear on coins, several monetary denominations came to be known as 'a crown' or the equivalent word in the local language, such as krone. This persists in the case of the national currencies of the Scandinavian countries and the Czech Republic. The crown of the United Kingdom became a commemorative coin and, as at a value of 25p was last minted in 1981, although the size was resurrected for 5 pound pieces. The generic term "crown sized" is frequently used for any coin roughly the size of an American silver dollar.