Van Dyck portrait
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Anthony Van Dyck painting 'found online'

9 March 2013 Last updated at 07:30 GMT

A previously unknown painting by 17th Century master Van Dyck has been identified after being spotted online.

The portrait was previously thought to have been a copy, and was in storage at the Bowes Museum in County Durham.

But it was photographed for a project to put all of the UK's oil paintings on the BBC Your Paintings website, where it was spotted by an art historian.

Aisling McVeigh reports.