Description: [caption id="" align="aligncenter" width="400" caption="Portrait of Albert Einstein and Others (1879-1955), Physicist, by unidentified photographer, 1931, Smithsonian Institution Libraries."][/caption] This post is second in a series that highlights some of our most popular photos on the Flickr Commons. This photo of Einstein pictured with a group of intellectuals is one of
Description: [caption id="" align="aligncenter" width="420" caption="The Great Pyramid and the Great Sphinx, from "Egypt, Sinai and Jerusalem" Portfolio, 1858, Francis Frith"][/caption] The first examples of travel photography are almost simultaneous with the invention of photography itself. In 1841, following an extensive trip through the Middle East, wine merchant and early photographer,