The sanctuary room is reached through the back of the kitchen and the central cantina (cellar), and is particularly tranquil, being up under the ground.
It’s a perfect meditation room: its snugness is complimented by a low ceiling with big wooden beams (currently covered in cotton sheeting), and a super-comfortable futon bed. It has an arched niche, and other quirky spaces.
It is also a great guest room; cool and dark in summer, and very cosy in winter, with the heat from the kitchen stove coming up into the space. I have also used it as an office, and a sewing room, over the years.