Maison natale de Jean-Henri Lambert 1728-1777 Célèbre savant, On lui doit la projection cartographique un théorème. Membre de l'Académie Royale de Prusse.

English translation: "Maison natale de Jean-Henri Lambert 1728-1777 Famous scholar, We owe him the cartographic projection a theorem. Member of the Royal Academy of Prussia. [AWS Translate]"
This is an approximate position

between Place de la Réunion and Place Lambert, Mulhouse
[geolocate this address]
Google Streetview OpenStreetMap

Colour: blue

Wikimedia:

Flickr: