Post Card from Paris

We have part of an old postcard from Paris.  It appears that someone just wanted to keep the stamps, so they tore it in half.

The stamps are a 15f  Marianne from 1955 (Scott 753) plus a "Coat of Arms" stamp for Aunis (Scott 738) from 1954.  The postmark is 1955.  The first line looks like "18 H" which would be 6PM, and then "15 - 6" which would be June 15.

The other side of the postcard is more interesting.

We can edit it to a more rectangular form either long

or tall

Now, where is it?  Unfortunately, if the post card said, it was on the part that was torn off.

Having been to Paris, it would seem to be one of the large parks or gardens.  Possibly the Jardin des Tuileries or Jardins des Champs-Elysees with the Petit Palais.  But the Petit Palais is the wrong shape for the building in the background.

The building in the background would be the Pantheon (from an e-bay sale of an old post card).

which would mean that the park is the Jardin du Luxembourg  (from Wikipedia).

And sure enough we can find similar pictures, like this one from Flickr by Laney Bird:

There are more similar (contemporary) ones, but they seem to be copyrighted stock photos, such as this by Getty Images:

or this from Alamy:

Our image is only black and white, and probably from around 1950.  We know it is earlier than 1955 but I don't know how to tell how much earlier.