We saw this graffiti on a wall in the Kazimierz district of Krakow, Poland. Kazimierz was the Jewish area of Krakow from the 14th century until the Second World War.
It's a very interesting area of the city. It's hip, trendy, and in the midst of revitalization. It's also full of abandoned and crumbling buildings, which have little chance of ever being utilized again. Why? No one knows who owns them. The Jewish owners were forced out during WW2, and no one knows where they are.