Vintage Cabinet Card. Carlos Maria de Alvear By Stein in Buenos Aires. 

A style of photography
 widely used for portraits in the late 19th century, mounted on a card.

Carlos Maria de Alvear was a Argentina soldier and Stateman. Supreme Director of the United
Provinces of the Rio de la Plata.
Avlear was one if the few professional military officers to participate in the Argentine War of Independence 
on the side of the revolutionaries, having served in the Spanish Army during the Napoleonic Wars.
He became an active Freemason. 
While in Cadiz, he founded the Sociedad de los Caballeros Racionales, a masonic secret society.