A terrific post recapping the early years of photography. The oldest known color photograph was taken in 1872.
Update: Or was it? James Clerk Maxwell took this color photo of a purty ribbon in 1861. Maxwell also, and so but by the way, linked electromagnetism and light in a seminal paper from that same year, work that Albert Einstein called “the most profound and the most fruitful that physics has experienced since the time of Newton”. (thx, chris)