As many readers might have noticed, from my first and most recent book, I'm slightly obsessed with medieval information design, and the remarkable work of many our visualization forefathers, such as Isidore of Seville (ca. 560-636), Lambert of Saint-Omer (ca. 1061-ca. 1125), or Joachim of Fiore (ca. 1135-1202). An important figure in this context was the German historian [...]
