History Photographed on Instagram: "A daguerreotype portrait of John Quincy Adams, taken in 1843, is being offered at auction. ⁠ ⁠ This photograph is recognized as the oldest known surviving image of a U.S. president.⁠ ⁠ It was produced using the daguerreotype process, an early photographic technique that created images on silvered copper plates. ⁠ ⁠ The portrait was made after Adams left office, during the earliest years of commercial photography. ⁠ ⁠ Its survival provides a rare visual documen