If you like this kind of things the French state geographic portal (https://www.geoportail.gouv.fr https://www.geoportail.gouv.fr) lets you load crazy tiles lik

If you like this kind of things the French state geographic portal (https://www.geoportail.gouv.fr https://www.geoportail.gouv.fr) lets you load crazy tiles like the Cassiny maps (from 1682) and the military staff map from 1820. It's a blast, but in French only so you'll have to fiddle around a little.