Napoleon III lived here 1848
The London scheme's earliest surviving blue plaque - the second to be erected and the only one to commemorate an individual who was still alive when it was installed. The use of the colour blue was rare and not repeated often - at the time, this was difficult and expensive to manufacture. Of the (Royal) Society of Arts plaques which survive, almost all are terracotta.
1c King Street, St James's, Westminster, SW1, London
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by administered by English Heritage as part of the London wide plaque scheme and Royal Society Of Arts in 1867