For those that haven't seen them yet - and they don't seem to have been posted here yet - some might be interested in the following two charts:
The HISTOMAP: Four Thousand Years of World History - Relative Power of Contemporary States, Nations and Empires
A vertical chart showing relative world powers and events over 4,000 years, chart made in 1931
Link to the full 2,097 x 9,554 3.68Mb chart: http://imgur.com/r/Infographics/xRrPg6P
Online zoom-able version: http://www.davidrumsey.com/luna/servlet/detail/RUMSEY~8~1~200375~3001080:The-Histomap-
Adams Synchronological Chart of Ancient, Modern and Biblical History
This is a 23 foot (!) fold-out horizontal chart originally from from 1871, based on 'bible history' from Adam onwards
https://en.wikipedia.org/wiki/Adams_Synchronological_Chart_or_Map_of_History
Link to the full 40,445 x 4,309 45Mb chart: https://upload.wikimedia.org/wikipedia/commons/7/71/Adams_Synchronological_Chart%2C_1881.jpg
Online zoom-able version: http://www.davidrumsey.com/luna/servlet/detail/RUMSEY~8~1~226099~5505934:Composite--Adams--Synchronological-