Milan Cathedral
Old's work has been displayed at various exhibitions since the 1930s. A large number of his models formed the 'Richold collection', which of its type was generally regarded as unrivalled. The collection has since been broken up and sold off. Its star piece was a 1:100 scale model of Milan Cathedral, which was painstakingly recreated over a period of 5 years (1/100th the time the real Milan Cathedral took to build).