The Thereza Christina Maria Collection consists of 21,742 photographs assembled by Emperor Pedro II and left by him to the National Library of Brazil. The collection covers a vast range of subjects. It documents the achievements of Brazil and the Brazilian people in the 19th century, as well as includes many photographs from Europe, Africa, and North America. This photograph by an unknown photographer is of a black woman, in a studio pose, wearing the dress common to Brazilian slaves of the 19th century. Memory of the World; Slavery; Slaves--Social life and customs