The Michelin Green Guide for the Berry and Limousin regions says of Châtillon-sur-Indre: Au centre de la ville, la masse imposante de ce donjon (12e siècle), cerclé d'un deuxième enceinte de la même époque, cache désormais un château d'eau. Du sommet, panorama sur la ville et la vallée de l'Indre.
In other words, the imposing 12th-century hulk called the Tower of Caesar, encircled by a second wall built in the same period, now serves to house a water tower. From the top, there are panoramic views of the town and the Indre river valley. I'd like to go back there and climb up to the top of the tower, and also see what the Friday morning market is like. Maybe in November.
One thing that was surprising is that the school just below the old tower was open and we could hear children's voices inside when we walked by.
Apparently, there is also a château in Châtillon (the word derives from château) but we didn't see it. Next time... We did notice a number of ornate buildings, treasures from another era, all around the town.
P.S. Our new lean-to greenhouse, attached to the back of the house, was built yesterday. The aluminum structure is in place, and the concrete footings will dry and set up this week. Then the glass panels can be installed next weekend.