Normandy is divided into Upper and Lower regions. Many Castles, or Chateaus, dot the land.. The wealthy French tried to excel in design, above and beyond the ostentatious designs of each other. Most castles are owned privately. Some owners welcome occasional visits. There are plans for organized visits of the castle grounds. Some weekends have open castle doors. And, some castles/chateaus been converted into Hotels.
http://www.visitnormandy.org/Normandy.nsf/Visit/Castles.htm
The following list is not complete, however the visit normandy website states that there is currently 98 Castles online
Upper Normandy Castles
Ancretieville-Saint- Victor: Chateau de Saint-Victor
Type: Private
Location: Ancretieville-Saint-Victor
Closest: Yvetot
Built: 1730
Visit: Sometimes
GPS: N49 40 14.4 E0 58 35.3 (Approx.)
Remarks: Once a year, the castle can be visited.
Angerville-Bailleul: Chateau de Bailleul
Type: Private
Location: Angerville-Bailleul
Closest: Valmont
Built: 16th
Visit: Yes
GPS: N49 39 57.9 E0 27 19.5 (Approx.)
Remarks: Gardens and castle open to public.
Angerville la Martel: Chateau Angerville-la-Martel
Type: Private
Location: Angerville-la-Martel
Closest: Valmont
Built: 17th
Visit: No
GPS: N49 45 33.1 E0 30 20.7 (Approx.)
Angiens: Chateau de Silleron
Type: Private
Location: Angiens
Closest: St.Valery-en-Caux
Built: 17th
Visit: No
GPS: N49 49 53.4 E0 48 50.7 (Approx.)
Anneville-Ambourville: Manoir des Templiers
Type: Hotel
Location: Anneville-Ambourville
Closest: Jumieges
Built: 13th
Visit: Yes
GPS: N49 27 45.4 E0 53 06.6 (Approx.)
Remarks: The Manor is used often for children events. It can be rented.
Anneville- Ambourville: Manoir de la Cheminee Tournante
Type: Private
Location: Anneville-Ambourville
Closest: Jumieges
Built: 17th
Visit: Sometimes
GPS: N49 27 55.4 E0 51 49.4 (Approx.)
Remarks: The gardens alongside the Seine river can sometimes be visited.
Arques la Batille-: Fortress of Arques-la-Bataille
Type: Public
Location: Arques-la-Bataille
Closest: Dieppe
Built: 1040
Visit: Yes
GPS: N49 52 43.5 E1 07 32.1
Remarks: Construction started in 1040 of this fortress. The castle is at times closed due to reconstruction, but it is still visitable (check in advance).
Auberville La Manuel: Chateau de Auberville La Manuel
Type: Private
Location: Auberville La Manuel
Closest: St.Martin-aux-Buneaux
Built: 1447
Visit: No
GPS: N49 49 42.1 E0 35 11.5
Remarks: Beautiful castle with real fortified gates.
Auffay: Chateau de Bosmelet
Type: Private
Location: Auffay
Closest: Dieppe
Built: 1632
Visit: Yes
GPS: N49 42 59.7 E1 06 05.8
Remarks: 5 hectar garden and castle can be visited from 1st of June to 30th of Septembre.
Avrancehes: Fortress of Avranches
Type: Public
Location: Avranches
Closest: Avranches
Built: 9th
Visit: Yes
GPS: N48 41.189 W1 21.644
Remarks: The fortress/castle is very much in ruins today. The castle was built by the Celts.
Bacqueville-en-Caux: Chateau More
Type: Public
Location: Bacqueville-en-Caux
Closest: Dieppe
Built: 1870
Visit: Sometimes
GPS: N49 47 11.3 E1 00 03.9 (Approx.)
Remarks: This is the head office of a boarding school.
Bayeux: Chateau de Sully ype: Hotel
Location: Bayeux
Closest: Caen
Built: 18th
Visit: Yes
GPS: N 49ð18'3.34" W 0ð43'58.72"
Remarks: 22 rooms and 15 acres ground.
Beaumesnil: Chateau de Beaumesnil
Type: Museum Public Restaurant
Location: Beaumesnil
Closest: Rouen
Built: 1633
Visit: Yes
GPS: N 49ð 0'49.91" E0ð42'34.09"
Remarks: Easter to June 30 - Friday - Monday - 14:00-18:00 July - August - Everyday 11:00-18:00 September - Everyday except Tuesday - 14:00-18:00 Entrance castle & parc: â¬7 adults, â¬3.50 kids Entrance park: â¬3 adults.
Bercheres sur Vesgre: Chateau de Bercheres
Type: Hotel Restaurant
Location: Bercheres sur Vesgre
Closest: Rouen
Built: 13th
Visit: Yes
GPS: N48 50 40.6 E1 32 24.7
Remarks: 21 room hotel and 24 hectar park, including a lake.
Bezancourt: Chateau du Landel Type: Hotel Restaurant
Location: Bezancourt
Closest: Rouen
Built: 18th
Visit: Yes
GPS: N49 26 33.6 E1 37 10.6
Remarks: 17 bedroom hotel.
See website for other castles and chateaus
Source for above: http://www.visitnormandy.org/Normandy.nsf/Visit/Castles.htm!OpenDoc...
Maybe Lower Normandy?
Montfique, Calvados: Gernon
"...the Gernon's castle had had a fame of being an impenetrable fortress, in fact it held for at least three hundred fifty years, until the civil war in the mid 1300âÂÂs, when enemies sieged the castle for months, before finally having to resort to burning out the castle & its village. "