From the David Rumsey Map Collection, a remarkable timeline/history of the world from 4004 BC to 1881 called Adams' Synchronological Chart. This is just a small bit of it:
According to Rumsey's site, the full timeline is more than 22 feet long. (via @john_overholt)
Update: A replica of this chart is available on Amazon in a few different iterations...I'm going to give this one a try. Apparently the charts are popular in Sunday schools and such because the timeline uses the Ussher chronology where the Earth is only 6000 years old.