What a very quick answer!
I recieved this link (new window).
The top blue part stands for France.
Then there is a leopard, in the old days three leopards, as a reminder to the English domination.
Then there is a fortress, which in fact is a stylized image of the Grosse Cloche, the big bell.
The two towers next to it on the coat-of-arms have disapeared.
At the bottom there is a "sea", symbolizing the Garonne river. You also can see a croissant there as a symbol for the Port de la Lune, the moon formed port of Bordeaux.
And now of course this is simple. Its three croissants, the so called Chiffre de Bordeaux, the Bordeaux figure or monogram.
Talking about croissants. Means growing and stands for the growing moon.
After the Turcs (who have the croissant in their coat-of-arms) were defeated at Vienna, the viennese bakers were allowed to make bread in the form of the croissant.
Later various kinds of viennese bread became popular in France, the so called viennoiseries.
Thanks Wiki.
