We had a visit to Pontivy which is located in Morbihan, more or less in the middle of Brittany. The town is situated on the River Blavet. Parking was easy with plenty of free spaces along the roadside and even though it was market day (which is a Monday 9am-2pm) there was parking in the market place where the market is held.
The Market at Pontivy has stalls offering fresh fruit and veg, meats a few cloths stalls, probably about 30 stalls.
After wandering around the town we eventually found the Chataeu des Rohan, which you would have thought would have been easy to find as it is such a large building. The signs are not great and you can't see the Chataeu from the town centre. If you walk along the river with the market place on your right you will then come across the Chateau just past where the river joins the Nantes Brest Canal.
The Chateau is currently ungoing some stone works as part of the wallk collapsed in 2014, so you can't walk all the way round it at the moment.
Although impressive, it does not look as good as shown on the websites and leaflets.