8 January 2013 Last updated at 07:50 ET

Big Picture: 'New' Titian joins collection

Portrait of a Man (Girolamo Fracastoro), attributed to Titian

A portrait acquired by the National Gallery in 1924 has been newly authenticated as a work by the Renaissance master Titian. Portrait of a Man, thought to depict the poet and scholar Girolamo Fracastoro, becomes one of 15 pieces by the Italian painter owned or co-owned by the London institution.

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