Tchorek plaques

Tchorek plaques are a common design of memorial plaque in Warsaw, Poland, used to commemorate places where battles or executions took place during the German occupation of the city during World War II. They are based on an original design by sculptor Karol Tchorek from 1949.

These plaques were installed at various locations in Warsaw from the 1950s until the end of the communist era in Poland, and are one of the most characteristic elements of the landscape of the capital. Many of the original plaques no longer exist, having been removed or destroyed during the ongoing modernisation and expansion of the city and its transport network. However, in 2013 there were still more than 160 Tchorek plaques within the administrative borders of Warsaw.

Source: Wikipedia