Amazing prerevolutionary color photos taken by Sergei Mikhailovich Prokudin-Gorskii, who made his color photos by making three exposures through differently colored filters. The Library of Congress bought the negatives from his heirs in 1948 and, using computers and imaging software, has generated the fully colored versions. They are now on exhibit and you can see them here.
HT: INDC Jounal.
40 minutes ago