We may think that garden rooms are a relatively new feature in garden design, but they actually go back a long way in garden history to the hortus conclusus — the enclosed garden. The Hortus conclusus started in the ancient gardens of Persia, Egypt and Mesopotamia, then reappeared in the Middle Ages and later as the core of 20th-century Arts and Crafts gardens.http://www.houzz.com/ideabooks/6 ...