Collecting Coins and Banknotes, as well as an auxiliary branch of historical science that studies coins, their archaeological complexes (treasures), the history of coinage, money circulation based on coins and matters related to coin production (forging dies, documents, etc.).The term numismatics for the science of coins began to be used in the Middle Ages. Coin collecting began to spread in Europe in the 14th century, with about 950 coin collections known in the 16th century. Scientific studies of coins and their collections began later, in the 18th century.At the moment, scientific numismatics is one of the fields of historical science, based on archaeological finds, it allows to determine trade and cultural relations of various countries, their intensity, etc.Collecting numismatics has now become one of the most profitable businesses (according to some estimates, the most profitable of legal businesses).