Poussin painting ‘copy’ to hang in main galleries with new label

The Triumph of Silenus was relegated to storerooms but new study casts it in a new light

It was bought by the National Gallery in the 1820s as a painting by Nicolas Poussin, the 17th-century French master. But The Triumph of Silenus - a bacchanalian revel - has long been relegated to the storerooms, having been repeatedly rejected by some of the 20th-century's foremost experts as a mere copy.

Now doubts about the picture have been dispelled and it will hang in the main galleries with a new label bearing Poussin's name.