LONDON, UNITED KINGDOM - NOVEMBER 29, 2024: Art handlers hold a painting by Anthony van Dyck ‘An Andalusian Horse’ – his first grand-scale depiction of a lone horse – has an additional element of rarity and significance: his only surviving landscape in oil can be found hidden on the reverse of the original canvas (estimate: Ł2,000,000 – 3,000,000) during a photocall at Christie's auction house ahead of the Classic Week Sales in London, United Kingdom on November 29, 2024. (Photo by WIktor Szymanowicz/NurPhoto) (Photo by WIktor Szymanowicz / NurPhoto / NurPhoto via AFP)