The pastry of Pierre Hermé is as beautiful as it is delicious and subtle. Some creations can be found all year long, like my all-time-favourite Ispahan (rose macaron with fresh raspberry and lychee) whilst others vary according to the season. Indeed, in line with French fashion industry, Pierre Hermé launches his summer- and winter-collection... So chic!
If you are a tourist and want to buy something you can eat outdoors, I recommend that you opt for a couple of macarons (easy to handle!).
There are two shops in Paris and several in Tokyo.
72 rue Bonaparte (métro Saint Sulpice, line 4)
185 rue de Vaugirard (métro Pasteur, line 6 and 12)