Later he made stained glass windows in a wide range of English churches and mansions.
Two years later he and his wife moved to Dornach, Switzerland to participate in the decoration of the anthroposophical center Goetheanum with other artists.
[2] Rosenkrantz is one of those versatile, highly-trained artistic personalities that turns readily to the plastic arts and find in almost any one of them a means for self-expression.
He reverences the traditional sentiment of this art which has voiced Christianity; he carefully studies its methods and its crafts, but he is willing to benefit by the processes of modern glass manufacturer and that appreciation of harmonised colour which in modern years has been evolved in the art.Rosenkrantz came to Denmark in the fall of 1939 to organize an exhibition in Copenhagen for his 70th birthday on 9 April 1940.
[2] Influenced by anthroposophy through Rudolf Steiner and theories by Goethe, Rosenkrantz's works reflected a bold use of color.
[2] He made stained glass windows for churches, houses and castles while he lived in England.