Embedded into the cobblestones of Europe are Stolpersteine—stumbling stones.

Carefully hand-chiseled with names and dates, these small, brass plaques make up the largest monument to the Holocaust in the world. Today, you can find over 100,000 stones across Europe.

The Stumbling Stones Project was begun by artist Gunter Demnig as a way to remember that each victim of the Holocaust had a life that was terribly and tragically stolen. Each memorial plaque is placed outside the last voluntary address of the person—the homes from which they were arrested and often taken to concentration camps. Not all were Jewish, some were persecuted for being Romani, disabled, or queer, and not all shared the same fate. These stories include that of a resistance fighter, an art conservator, an Olympian, and the young Anne Frank. Take a journey around Europe to learn their stories.