A New Chart of History
This is the granddaddy of all world history timelines. Designed by the English philosopher Joseph Priestley and published in 1769, it was the first attempt to capture world history in a single chart. It has influenced every world history timeline made since, especially the one published by Schofield and Sims. As far as I know, it is not available as a poster anywhere but you can enjoy a high-res view by clicking on the image below.