Marbel arch at Kew-yung Jwan, Nankow Pass, Penchili province, China, built during the Yuen dynasty (c. 1345 AD)

    • John Thomson

    Licence: Attribution 4.0 International (CC BY 4.0)

    Credit: Marbel arch at Kew-yung Jwan, Nankow Pass, Penchili province, China, built during the Yuen dynasty (c. 1345 AD). Wellcome Collection. Source: Wellcome Collection.

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