Lena is a German girl who recently published a book called "Behind the Closed Curtains." It reminds us that it is possible to dust off our traditional home elements, remodel them and give them a modern look and create a daring, bold and lively interior design. What Lena has recorded in her book is only a sample of the historical background of using decorations in Iranian interior design and architecture, a custom rooted in the country's culture and religion.