This website shows a map of GitHub. Each dot is a project. Two dots within the same cluster are usually close to each other if multiple users frequently gave stars to both projects
Map showing extent of Doggerland, a vast territory in northwest Europe that was above sea level 16,000 years ago, and the territory's diminishing size as ice melted and the North Sea rose. Illustration by Claus Lunau/Science Photo Library.
Map was made in 1910, and the monarchy collapsed in 1918. At its creation it wasn't a historical map, it was showing the history of a still existing and thriving entity.