Daguerreotype
Morse met the inventor of the daguerreotype, Louis-Jacques-Mande Daguerre, in Paris in January 1839 when Daguerre's invention was announced [2]. While the daguerreotype fascinated Morse, he was concerned about how the new invention would compete with his telegraph. However, Morse's viewing of the daguerreotype alleviated his fears when he saw how revolutionary its technology was. Morse wrote a letter to his brother Sidney describing Daguerre's invention, which Sidney then published in the New-York Observer on April 20, 1839. While this was not the first report of the daguerreotype to appear in America, it was the first in-person report to appear in the United States.
Filippos Margaritis
Filippos Margaritis (1810–1892) is generally acknowledged to have been the first Greek photographer, whose earliest daguerreotypes, of the Acropolis of Athens, date from 1847. Having studied painting in lithography in Paris, he opened a studio in [Athens] in 1837 and began teaching at the School of Fine Arts in 1842. He learned the techniques of the daguerreotypes from the French photographer Philibert Perraud who arrived in Greece in 1847, and in turn passed on his knowledge to the students of Athens Polytechnic around 1850.