These are mainly links to georeferenced raster images and databases, not vectors / OSM data. But, still -- I've already spent hours browsing old maps of my home city. For anyone interested in contributing to this project, oldmapsonline might be a great reference.
This is cool. For my hometown Berlin I love to browse this map https://1928.tagesspiegel.de/ it shows Berlin in 1928 and most areas are still the same.
Yeah, it's very intersting indeed. Roads and street layouts usually don't change that much over the centuries -- they get integrated and amended, but seldom disappear. I was pretty amazed to recognize the street layout of Leipzig in the 1740ies: https://biblio.unibe.ch/web-apps/maps/zoomify.php?pic=Ryh_53...
These are mainly links to georeferenced raster images and databases, not vectors / OSM data. But, still -- I've already spent hours browsing old maps of my home city. For anyone interested in contributing to this project, oldmapsonline might be a great reference.