You almost have to add the « sur-Indre » to the name Châtillon. It means that the town is located on the Indre river. There's another Châtillon even closer to Saint-Aignan called Châtillon-sur-Cher — not to mention Châtillon-sur-Loire, Châtillon-sur-Seine, Châtillon-sur-Saône, Châtillon-sur-Oise, Châtillon-sur-Meuse, and so on. French Wikipedia lists more than 35 towns that have the word Châtillon in their name.
Yesterday our plumbing and heating contractor was here doing work. I asked him if he had lived in Saint-Aignan for a long time. « Toute ma vie... » was his answer. I told him about our recent visit to Châtillon-sur-Indre, and how surprised we were that the place felt so abandoned. He told me that there are a lot of personnes âgées down there and in that whole département, which is very rural. It seems the hospital and a retirement home in Châtillon specialize in caring for Alzheimer's patients.
That was interesting, because the 87-year-old man I mentioned earlier, who rode up on a bicycle and talked to us about how all the young people had moved away and so many businesses had closed down, might need that kind of care. After talking to him, we and our friends continued our walk around the town. About 30 minutes after our first encounter, we ran into the same man, who obviously didn't remember us at all. He told us the whole story a second time, in almost exactly the same words. I know it was the same man because I recognized the shoes he was wearing — they looked like bedroom slippers.
In French, to say that the streets were deserted, you can say: « Il n'avait pas un chat. » We couldn't really say that about Châtillon-sur-Indre. We saw about as many cats as people as we walked around.