Sebastian C. Adams's Synchronological Chart from the late 19th century presents 5,885 years of history (4004 BCE – 1881 AD) on a magnificent 27 inch x 23 foot illustrated and annotated timeline. What a stunner. You can zoom and pan through the whole thing at the David Rumsey Map Collection or order a scaled-down print.
According to the book Cartographies of Time: History of the Timeline, the Synchronological Chart "was ninetheenth-century America's surpassing achievement in complexity and synthetic power."
(via Clifford Pickover)