The Kronos Quartet performing in the open air in Warszawa, Poland (Królikarnia). Photograph by Henryk Kotowski in July 2006.
<a href="//commons.wikimedia.org/wiki/User:Kotoviski" title="User:Kotoviski">Kotoviski</a>
CC BY 2.5
Self-published work by <a href="//commons.wikimedia.org/wiki/User:Kotoviski" title="User:Kotoviski">Kotoviski</a>