Interest by historians to the numismatics took in the 18th century to coin collecting is a popular hobby, can be more but than that. As a historical Hilfswissenschaft, numismatics focuses on coins of bygone times and the history of money. History of numismatics first approaches of a scientific preoccupation with coins can be found in which Prince exhibit and collect coins from all over the world were in the Munzkabinetten in medieval courts. At the time of the enlightenment in the 18th century the numismatics increased the interest of professional historians. Coins are among the most pristine tradition shapes that could not be falsified as opposed to literary testimonies by copies over the centuries. Therefore one Mass to a high source value coins especially for the study of antiquity and the middle ages. Today is devoted to these periods mainly numismatics. It is taught in universities often in connection with ancient history and archaeology. In Vienna its own scientific Institute deals with numismatics, while similar operations in Germany on museums and Munzkabinetten are located. There, it deals mainly with the description and interpretation of new findings and the creation of exhibition catalogues. Methods and issues of Numismatic coins are modern and Premodern equally standardised commodities. While modern course and commemorative coin sets are usually preserved, only a fraction of the coins in circulation are known for ancient and medieval. However, the new pieces are discovered during excavations. Therefore, the Fund coins numismatics is the most active and innovative part of numismatics. Methods for determination and chronological order of discovery coins have become since the 19th century. The stamp analysis devoted to the prints and pulls so conclusions drawn on the stamping time. This can also be determined by an analysis of the metal the coin. After successful dating, one can further interpretation of the coin will be made. Their metal and value in combination with the site provide information on economic and social-historical questions. The interpretation of the Pragebildes also says something about the political and cultural history of the period. In addressing with later moves the focus of the numismatics of the single fund to the history of money, which is gaining relevance with the growing economy since the late Middle Ages. For historian, numismatist, collector coins, are highly sought after whether from antiquity or modern times. Especially in the online trading it renowned coin dealers and coin trading company, which use different eras and areas of collector coins boyfriend makes it possible, in recent years to expand its coin collection.