In the premier issue of the new travel magazine AFAR I found an article on the French artisan bread in which the author learns the secret of artisan bread in the 9th Arr. at Delmontel (Rue des Martyrs : at the end of Av Trudaine, around the corner of the Montmartre Studio Loft).
At the end of the article Denise Young writes the following tips :
To get the freshest bread, some French people routinely visit their bakeries twice a day. Look for the displayed baking times.