What year was the Chateau de Vitre castle built?

Answer 1

It was built of wood in the beginning of th 11th century and burned down on several occasions. At the end of the 11th century it was rebuilt of stone by Robert I. At the beginning of the 13th century it was rebuilt by Andre III. Then in the 15th century it was expanded by Guy XII de Laval.

Answer 2

From what I can tell, no one knows why it was originally built, but in the 14th century it was used as defense from invasion.