OK, Nantes' history is based on the biscuit. Inside the castle, there was a display of old biscuits. These here are somewhat over 100 years old. The 'LU' (Lefevre-Utile) company -- baker of these here -- is still based in Nantes, and was until recently one of the contract bakers for Girl Scout cookies in the US. You can buy their classic 'Petit Beurre' biscuits and the 'Petit Ecoliers' easily in the US. Though as can be seen here from the box in the middle, the Petit Ecoliers did not apparently use to feature a chocolate relief schoolboy. Hmm. . .