The Monastery is the temple within the keep of La Valette Castle. It is a large circular building, on two floors. In the basement, you can find many Crafting components, a silver dagger, a book about nekkers and a schematic to create the Superb leather trousers. A long stone bridge leads to the solar situated in a smaller dependence. This is where Geralt meets the Archpriest and Arthur Tailles on his way to reach Foltest's children, Anaïs and Boussy, in the solar.