Art Cologne 2019 kicks off

A visitor takes photos of an installation by artist Ivan Navarro at the Art Cologne 2019 in Cologne, Germany, on April 11, 2019. The four-day event Art Cologne, one of the most important international fair for art of the 20th and 21st centuries, kicked off here on Thursday, attracting about 180 galleries from around the world. (Xinhua/Lu Yang)