But the property failed to let and he was declared bankrupt in 1783 and left London. John Nash is responsible for many buildings around London and I am sure that you must have one favorite. He is responsible for the Buckingham Palace, Royal Mews, St James Park, Regent Street and many others. Nash's career effectively ended with the death of George IV in 1830. Nash's career effectively ended with the death of George IV in 1830.