One can hardly spend much time in London before one starts noticing the preponderance of blue plaques. The blue plaque scheme is run by English Heritage. The plaques represent people from the past who are well known or deserve recognition, and “link the people of the past with the places of the present.” The scheme has been going on since the 1860s.
Apparently, there are now over 900 plaques all over London (someone has actually taken the time to create a map of where all of them are located). Not all of them are blue, and not all of them represent British people; there is a “blue” (actually, lead) plaque outside Benjamin Franklin’s last remaining home, in Craven Street near Trafalgar Square. The plaques are a strong reminder of the ways in which the past and present often overlap.