This one was a labour of love and was made with help from my friend and pinball team captain Dan Miller who did the illustration and came up with the overall look and feel. You can see more of Dan's work here http://toothpicksandgum.com/ and here http://instagram.com/manmiller and follow him on twitter @metropolus.
One thing that I would have liked while making this viz is transparent backgrounds for sheets.
Oh and please note that the data collection took bloody ages, so if you spot any errors please let me know. And the countries are the modern equivalents - identifying individual US states under different monarchs got a bit much to deal with.
