Here are links to 2 different news articles about this recent spectacular accidental find. The unique context of the find may reveal much about the nature of monetary policy and / or military pay in the late Roman Empire in the west.
BBC News article – http://www.bbc.com/news/world-europe-36172538
The Guardian article, with video – https://www.theguardian.com/science/2016/apr/29/massive-haul-ancient-roman-coins-unearthed-spain
Clio Ancient Art & Antiquities 