Like the château, the church sits up above the river and looms over the houses along the river bank. There are two churches, really — an old one below, and a "newer" one built on top of it centuries later.
The lower church has walls decorated with frescoes dating back as far as 1000 years. Some of them are pretty faded and worn these days, but some of them are still very colorful.
I keep reading that you can climb up into one of the church towers and get a panoramic view of Saint-Aignan and the Cher River valley. Finding out more about that, and doing it, is a project for the summer of 2010. Been to the depths, now aspiring to the heights!
There are more pictures of Saint-Aignan's buildings and streets here, in a 2006 blog post.