PORTLAND — The annual exhibit of artwork created by students in the city’s public schools will open Thursday at City Hall.

More than 500 paintings, drawings, sculptures, jewelry and other pieces will be displayed in hallways throughout the building on Congress Street through May 13.

Students in kindergarten through high school contributed artwork for the show. Admission is free and open to the public during regular business hours of 8:30 a.m. to 4:30 p.m.

An opening reception will be held Thursday from 3 to 6:30 p.m. The school district’s Gig Orchestra will perform from 3:30 to 4 p.m. Light refreshments will be served.