Also 1800s has good coverage of sources. Like this one in Europe: https://maps.arcanum.com/en/ https://maps.arcanum.com/en/ (actually this one is probably licen

Also 1800s has good coverage of sources. Like this one in Europe: https://maps.arcanum.com/en/ https://maps.arcanum.com/en/ (actually this one is probably licensed - but some of those maps have public domain version).