| Gustave Le Gray Mass, Camp de Châlons [Album "Souvenirs du Camp de Châlons"] 1857 Albumen print 30 × 36.7 cm (image/paper); 52.8 × 63.8 cm (album page) Art Institute of Chicago Major Acquisitions Centennial Endowment, Reference Number: 1995.130.3 LL/112774
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