 The window-mural consists of 71 modules which cover an area of about 3,200 meters square.The work uses approximately 75 tons of metal supports, 45 tons of blown glass and 25 tons of lead to join the about 500,000 glass pieces, which range in size from 15 to 45 cm.Twenty eight different colors of glass were used, most of which came from Italy, Germany, France, Belgium, Japan, Canada and the United States.