Sylloge Nummorum Graecorum
Encyclopedia
Sylloge Nummorum Graecorum (SNG) is an ancient Greek coin research project of the British Academy
British Academy
The British Academy is the United Kingdom's national body for the humanities and the social sciences. Its purpose is to inspire, recognise and support excellence in the humanities and social sciences, throughout the UK and internationally, and to champion their role and value.It receives an annual...

 which catalogues both public and private Greek coin collections in the UK
United Kingdom
The United Kingdom of Great Britain and Northern IrelandIn the United Kingdom and Dependencies, other languages have been officially recognised as legitimate autochthonous languages under the European Charter for Regional or Minority Languages...

. It has published more than 120 volumes of images and data and its online database includes over 25,000 coins in British collections. Though not necessarily comprehensive, it is considered a useful resource for researched Greek and Greek Imperial coinage for numismatists
Numismatics
Numismatics is the study or collection of currency, including coins, tokens, paper money, and related objects. While numismatists are often characterized as students or collectors of coins, the discipline also includes the broader study of money and other payment media used to resolve debts and the...

and historians alike at both specialist and undergraduate level.
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