Comment by elrostelperien

(Not the same thing, but related)

Map platforms from Brazilian cities that allow browsing with old map layers:

Curitiba 1857

https://geocuritiba.ippuc.org.br/portal/apps/webappviewer/in...

São Paulo 1930

https://geosampa.prefeitura.sp.gov.br/PaginasPublicas/_SBC.a...