Following the sketches of Marta Blasco we made the window called “Blue Sibyl” completely made in blue blown flashed glass. Marta Blasco is a brilliant Mallorca artist; her works in charcoal and graphite stand out for their meticulous detail and her move to the field of glass presented a professional challenge for the workshop engravers. Unique blown glass pieces had to be ordered. The fantastic final result is worth all the effort made by both sides.