The map shows the main sites where the Holocaust was perpetrated on the Sinti and Roma in occupied Europe. It records all of the known concentration camps, extermination camps and other camps where Sinti and Roma prisoners were held. The actual number of camps and execution sites is far higher.

The symbols refer to mass executions and deportations to concentration camps and extermination camps. Many mass graves remain undiscovered to this day. No-one knows the precise number and names of the victims.