20th century photograph of an armed Papuan archer. Original photograph comes from the Bain Collection at the Library of Congress.

1919 photograph of a Yorkshire terrier, a St. Bernard and their owner. Original photograph comes from the archives of Cornell University Library.

20th century photograph of Nakayama Hakudō. This photograph was taken from Wikimedia Commons. Original source uncertain.

1920 photograph of a working class housing district in Amsterdam. Original photograph comes from the archives of Het Nieuwe Instituut.

1932 photograph of the Market Hall in Amsterdam. Original photograph comes from the archives of Het Nieuwe Instituut.

20th century photograph of a physician's house in Vorden. Original photograph comes from the archives of Het Nieuwe Instituut.

20th century photograph a school in Alamo. This photograph was taken from Wikimedia Commons. Original source uncertain.

1918 photograph of a group of people in California during the flu epidemic. Original photograph comes from the archives of Mill Valley Public Library.

1910 photograph of the Sheikh of Rabbat-Moab and his escort. This photograph was taken from Wikimedia Commons. Original source uncertain.

1920 photograph of a group of men in front of a dry goods store in Mumbai. This photograph was taken from Wikimedia Commons. Original source uncertain.

1935 photograph of a couple doing acrobatics at the beach. Original photograph comes from the archives of Mitchell Library.

19th century photograph of Crown Prince of Prussia and Prince Wilhelm II at Balmoral Castle. Original photograph comes from the archives of The Royal Collection Trust.

19th century portrait of Carl Reinecke. Original photograph comes from the archives of Bergen Public Library.

1898 photograph of a woman wearing an opera cape. Original photograph comes from the Powerhouse Museum Collection.