The bubble Chart

 1. Each bubble represents the name of the artist whose works were displayed in the exhibitions through the years 1960-1989. 2. The Size of the Circle in the plot depends on occurrences in the data. 3. The Colors and Clusters are assigned to the nationalities of the people.
More than 30 occurrences More than 20 occurrences More than 10 occurrences More than 5 occurrences Nationality German French Polish American Spanish Swiss