Theodor Mommsen (1817-1903) is pictured in the Cabinet card photographed by Giacomo Brogil in Firenze, Italy. Mommsen was a German classical scholar, historian, jurist, journalist, politician, archaeologist, and writer. He is considered the greatest classicist of the 19th century. He was a great scholar of Roman History. He won the Nobel Prize in 1902. He was a member of the German and Prussian Parliaments. Mark Twain wrote of meeting him on his European tour of 1892. The photograph is from the Photographs of Celebrities collection of Charles L Ritzmann.
THE CABINET CARD GALLERY 
Reblogged this on Lenora's Culture Center and Foray into History.
The correct name is Giacomo Brogi, the L being only a doodle.