One of the oldest churches in the Loire Valley, with foundations traditionally dated to the 4th century, though the current Romanesque structure is mostly 12th century. The interior is cool and dark, with heavy round pillars and simple proportions that feel genuinely ancient. A few notable carved capitals and some medieval stonework are worth looking for.
The church sits in a small square just below the chateau, often overlooked by visitors rushing between the big sights. It takes only twenty minutes to visit but provides a useful counterpoint to the extravagance of the nearby Renaissance architecture — here you see what the Loire Valley looked like before the kings arrived.