Adolfo Ruiz Calleja. - Photograph


The author

Dr. Adolfo Ruiz Calleja got his bachelor degree in Telecommunication Engineering at the University of Valladolid (Spain) in 2007 and the PhD degree at this same university in 2013. Meanwhile he also studied a Master in Philosophy of Science at the University of Salamanca (Spain). He is currently working at Tallinn University (Estonia), where he holds a senior research position. His research interests are related to Learning Analytics, Open Data and educational data management.
He has been passionate about numismatics, history and coin collecting since he was a kid. For this reason he has been an active blogger about this topic since 2009, writing the reference blog for the Spanish-speaker collectors: Blog Numismático.

The blog

The blog focusses on the international coin market. It describes high-level international coins that are on sale. Each coin description is enriched by a comment about its historical background and its current economical aspects. Thus, the blog offers an overview of the coin market development.
The blog intends to offer an added value to those collectors who demand high quality coins, as well as to coin investors. It is also a place where coin and history lovers will find a nice selection of beautiful coins related to their historical background.
All the content of the blog is in English.


All the content of this blog is under the license Creative Commons Attribution-NoDerivs Unported 3.0