Color photographs from up to 100 years ago! See pictures from the archives of Albert Kahn, who had collected 180,000 black and white photos and 72,000 autochrome plates by 1929. Autochrome was an early method of putting color into photos, involving potato starch in primary colors. It was first used by the Lumière brothers  in 1907. Link -via Metafilter

(Image credit: Musée Albert-Kahn)