Source: https://www.flickr.com.Uploaded to Flickr by Yvette Gauthier and tagged with "arnoldboecklin". License: All Rights Reserved.

This old Art Nouveau boutique from 1905 is onArnold Böcklinwas first released in 1904 — it is out of the question that the lettering for a shop front would have been modeled directly after a printing typeface at that time. Arnold Böcklin nowadays is easily the most ubiquitous Art Nouveau typeface, and should better be avoided for that reason alone.