Chester Arnold (Press Democrat photo by John Burgess, 2006.)

Internationally known Sonoma painter Chester Arnold will speak about his work, as well as art and the world in general, at 6 p.m. Thursday, July 12, at the Sonoma County Museum.

A longtime art professor at the College of Marin, and well-known for his own work, Arnold won additonal attention six years ago, when he and his students painted, from photographs, portraits of some 2,000 U.S. soldiers killed in the Iraq War.

Admission to the 90-minute talk costs $8.

The museum’s current exhibit, “Chester Arnold: Trees,” runs through Sept. 9 at 425 Seventh St., Santa Rosa.

The Sonoma County Museum is open from 11 a.m. to 5 p.m. Tuesday through Sunday.

Admission: $5-$7; free for children under 12.

Information: www.sonomacountymuseum.org. (707) 579-1500.