How to grasp the scale of the transfer from Jewish art collectors persecuted by the Nazi to museums in the United States, Germany, Austria, France, Switzerland, the Netherlands, as well as countries in South America?

Some experiments in data visualization.

First, an overview (attention: the figures are not real, they are only to test the visualization.)

The devil is in the detail. Next, instead of agregating on countries of origin and destination, we can break it down into persecuted Jewish collectors (with their location in 1933) and the receiver of the artwork (in the city or even exact coordinates)