William Ewart (British politician)
Ewart's Hampton home is now Hampton library (the extension on the left is modern)
Blue Plaque on Hampton Library to William Ewart, Hampton, London
William Ewart (1 May 1798 – 23 January 1869) was a British politician. In 1863, Ewart conceived the idea of a blue plaque to commemorate a link between a location and a famous person or event, serving as a historical marker. It is the oldest such scheme in the world.