The Thereza Christina Maria collection is composed of 21,742 photos assembled by Emperor Pedro II (1825-91) throughout his life and donated by him to the National Library of Brazil. The collection covers a wide variety of subjects. It documents the achievements of Brazil and Brazilians in the 19th century and also includes many photographs of Europe, Africa, and North America. On December 6, 1882, Marc Ferrez commemorated Brazil’s contribution to tracking the transit of Venus by compiling a photomontage of the three men commissioned by the Imperial Observatory of Brazil to view the transit on the island of St. Thomas in the Antilles. Antonio Lins von Hoonholtz Tezpur, the Baron of Teffe, is shown at the top of the picture. Captain Lieutenant Francisco Calheiros da Graça is on the lower left. Lieutenant Arthur Indio do Brazil e Silva is on the lower right. Ferrez was one of Brazil’s most prolific photographers. He was instrumental in chronicling the development of Brazil at the end of the 19th century.