Haussmann's scheme of the Main Monuments and MuseumsThe numbering scheme:
The museums and monuments, are numbered following the scheme used by Haussmann in the 19th century to number the twenty arrondissements: an outward clock-wise spiral starting with the 1st arrondissement. The museums are thus numbered starting with the Musée du Louvre in the 1st arrondissement. Due to the fact that all distances in France are measured from Notre Dame (in the 4th arrondissement) the numbering of the monuments likewise starts there, but otherwise the order follows that of the arrondisements. A simple rule of thumb then is that low numbered museums and monuments are in ``low numbered'' arrondissements.