Some of the most beautiful and famous windows of Europe have this type of tracery. It can be seen at St Stephen's Vienna, Sainte Chapelle in Paris, at the Cathedrals of Limoges and Rouen in France, and at Milan Cathedral in Italy. In England the most famous windows like this are the West Window of York Minster with its design based on the Sacred Heart, the East Window at Carlisle Cathedral and the East window of Selby Abbey. Architectural Historians sometimes argue about which of these is the most beautiful.