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LEIDEN, NETHERLANDS - SEPTEMBER 14: Queen Maxima of The Netherlands opens the Asian Library of the University Leiden on September 14, 2017 in Leiden, Netherlands. The Asian Library has 30km of research and education material about Asia including prints, books, manuscripts and photographs. (Photo by Patrick van Katwijk/Getty Images)

LEIDEN, NETHERLANDS - SEPTEMBER 14: Queen Maxima of The Netherlands opens the Asian Library of the University Leiden on September 14, 2017 in Leiden, Netherlands. The Asian Library has 30km of research and education material about Asia including prints, books, manuscripts and photographs. (Photo by Patrick van Katwijk/Getty Images)