Comment by klokan

The TimeMap is in fact loading the data from OpenHistoricalMap on the deep zoomlevels (streets) so if you edit OpenHistoricalMap roads and houses it will be displayed there.

See Lille for example - and play with timeline here:

https://www.oldmapsonline.org/en/history/regions#position=13...

You will see directly how the town center has developed, fortifications, railways or highway... damn cool! :-)