| Adolf-Nikolay Erazmovich Boiarski Jiayuguan Fortress, the Westernmost Fort on the Great Wall of China, Gansu Province [Russian Scientific-Commercial Expedition to China, 1874-75 - Album] 1874 Albumen print 20.1 x 24.8 cm (oval) National Library of Brazil, Iconography Division (Fundação Biblioteca Nacional. Divisão de Iconografia) Thereza Christina Maria Collection LL/102315
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