That is a fantastic bit of history.
A couple of my German friends hate it, but I Germany they have a thing called "Stolpersteine" or "stumbling blocks"... In some towns they have small brass cobblestones, each with the names of family members who were sent to and dies in Concentration camps. These are set in the ground in front of the front door of their old house.... So you can be bimbling down a back alley, and suddenly you are walking over 4 Brass cobblestones, maybe 10 by 10 cm each, and you see this was Joe, Henreietta and their 2 daughters, arrersted in may 42, bead November 42...