What is the fine-grained topic of the following text: Now in his sixth decade as an artist, Geoffrey Key is now an artist of international repute, he has mounted major exhibitions in France, Hong Kong, the USA and Australia and is represented in important public and corporate collections, including the Salford and Manchester Art Galleries, National Art Library, the Victoria and Albert Museum, the Mandarin Oriental Hong Kong, Jockey Club Hong Kong, Societe Roquefort, Chateau de St Ouen, and Perrier. Only return the topic.
Geoffrey Key's international career and collections.