By far the most internationally celebrated glass artist and designer in Sweden. He has received numerous awards and his work is well represented in leading museums around the world. He works in a mythical, dream-like world of symbolic imagery. He undertakes what he himself describes as a never-ending research quest, in close cooperation with his co-workers at Åfors glassworks, several of whom have worked with Vallien for decades. He is known most of all as the master of sand moulding. His solid, deep-blue, four-meter-long ship has become part of modern glass history. His creations include Château, one of the best-selling ranges of handmade glasses over the years.