What is the fine-grained topic of the following text: Auch is known, too, for its colorful produce market and its associations to Charles de Batz, Comte d'Artagnan, who was born in the nearby Château de Castelmore and made famous by 19th-century French novelist Alexandre Dumas. Only return the topic.
Auch's produce market and associations with Charles de Batz, Comte d'Artagnan.