Culture Show presenter Alistair Sooke (right) and art historian Dr Bendor Grosvenor
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Van Dyck discovery: How to spot a master's artwork

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 seen by an art historian.

It depicts Olivia Boteler Porter, lady-in-waiting to King Charles I's wife, Henrietta Maria.

Culture Show presenter Alistair Sooke and art historian Dr Bendor Grosvenor explain how it is possible to spot an art work by a master.

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