The crowds lined the long narrow North Street, outside St Salvator's Quadrangle, as the sun came out.

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The Bavarian brewery takes its name from the Paulaner monks who produced the original doppelbock called Salvator, Latin for savior.

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The " Salvator Mundi" was, for years, thought to be a painting by one of da Vinci's pupils or associates.

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Mountainous Landscape with Travellers, said to be in the style of Italian painter Salvator Rosa, was also described as particularly valuable.

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"While Salvator is the most well-known doppelbock, almost 200 other breweries indicate the style by adding '-ator' to the beer's name, " continues the comprehensive book.

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"Salvator Mundi" is going on public display in London in November, as part of the exhibition Leonardo da Vinci: Painter at the Court of Milan at The National Gallery.

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