Tranquille Sanatorium was built in 1907 to treat tuberculosis, which was known as the "white plague" back then. It was a ranch beforehand. The BC government bought the land for the sanatorium. As the tuberculosis epidemic was spreading in the 1900s, a small community known as Tranquille was built around it. Originally, the facility was called the King Edward VII Sanatorium and served only to treat tuberculosis. The community built around the facility had gardens, houses, a gymnasium, a farm, a fire department, a auditorium, a cafeteria, a laundry mat, tennis courts, a steam plant, a school for handicapped children named “Stsmemelt Village”, and many more facilities, In 1958, the hospital closed and was reopened in 1959 to treat the mentally ill. It closed permanently in 1983 but briefly fu