You may want to also consider this alternative:

http://www.amazon.com/World-History-Timeline-Schofield-Sims/...

It has the advantage of being a little more modern/complete than the original Histomap, even if it's a little lighter on that nice minimalist aesthetic. I have one hanging on my wall and it looks good.

Print version, http://www.amazon.com/Time-Chart-World-History-Histomap/dp/1...

Digital: https://www.google.com/search?q=histomap+high+resolution

someone's selling a copy of one on eBay right now. Not cheap though: http://www.ebay.com/itm/Rolled-Map-John-Sparks-5-1-2-HISTOMA...