Avalon

Note:  this castle is not related to the mythical Avalon of Arthurian legends in any ways. At least, this Avalon castle did actually exist!

Avalon castle played a key role during all Middle Ages as the first line of defense of the Dauphiné province against Savoy (the border is just 3 kilometers (2 miles) away). 

Built on the site of an 11th century motte, the castle has kept its circular aspect and is extremely small. The fortified village built next to it was the home of several noblemen who possessed their own manors. The castle will go down to ruins from the middle of the 14th century, after the end of the war between  Dauphiné and Savoy