Where to visit in Paris

Hi

I have been collecting French stamps for a few years. I have a house in Burgundy and spend maybe 3-4 months a year here. I am also a bit of a fan of postboxes and as Paris isn't that far away I try to spend a day there a few times a year. Stamp shopping but mainly taking photos of postboxes.  

I don't know Paris that well so if anyone knows of stamp shops that are worth a visit then please let me know. 

If I was asked where someone interested in La Poste or stamps should visit in Paris I would suggest...

Musée de La Poste. 
I think Paris has had a postal museum for quite a few years, however the current version was renovated three or four years ago. It's not a massive museum but it does try and tell the story of the development of the postal service in France. It has exhibits dealing with how mail was transported, there is a little bit about the TGV La Poste train. There are also an exhibit detailing airmail. Exhibits on the development and design of stamps, and a few postboxes. Most of the descriptions are in French but its still worth a visit if you don't speak French.









Le Carre d'Encre
If you collect modern French stamps le Carre d'Encre, 13 bis, rue des Mathurins 75009 Paris is worth a visit however they are not open on Mondays. 

Yvert & Tellier
23, rue Drouot
Very small shop and the last time I was there fairly busy. I mean they had people waiting to be served. The first time I went there I kind of it expected it to be like Stanley Gibbons in London and it's not. Its much smaller didn't seem to have the full range of Yvert & Tellier catalogues on display. They had some packs to stamps to buy but not much.

Anyone got suggestions of stamp related shops to visit in Paris?

Thanks

Alex