Aux Arts et Sciences Réunis is one of our favourite restaurants in Paris. It's on avenue Jean-Jaurès in the 19th arrondissement. The closest metro station is Ourcq, but we always walk from our hotel, only five minutes away. The restaurant is part of the headquarters of the Compagnons Charpentiers du Devoir du Tour de France (the Master Carpenters' Guild). According to Routard, they are 'heroic defenders of the arts of stone, wood and...the dining table.' (You can always trust le Guide Routard, by the way. If a restaurant is in Routard, you are guaranteed a bon rapport prix / qualité, or good value for money.)
161, Avenue Jean Jaures
We've written about these pieces before, because there is a museum in Tours dedicated to all the Compagnons de la Tour de France, and many of the objects are very visibly stored in ground floor rooms offsite. They are artefacts of immense skill and beauty, and often wonderfully fantastical.