http://www.abrahamlincolnartgallery.com
It completely blew my mind the first time I saw it, for example the one gray hair in Lincolns beard.. It looks like he examined the hell out of every pixel and judged what was the best color...Here is the entire pic... 
It`s amazing, but like a friend of mine was saying, we still live in a time where all we have for our past history is primitive photograpy. 200 years from now people will be looking at digital photos that will look like they were taken yesterday.