Unveil the signature art of Leonardo da Vinci

Original, hidden, unexpected: Leonardo da Vinci's signatures were also the result of art documented for the first time in 11 works spanning 44 years: from

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United Kingdom ,France ,Austria ,United States ,Italy ,Great Britain ,Archangel Gabriel ,Vinci Leonardo ,Ivanar Bonfantino ,Royal Library Of Turin ,Royal Library ,Auguste Stone Publisher Giuseppe De Nicola ,Codex Atlanticus ,