Norwich — Norwich will mark the International Day of Peace Tuesday with a brief ceremony at City Hall at 11:50 a.m. and an evening lecture program on an early 20th century artist and peace activist.

The ceremony Tuesday will feature an invocation by a representative of the Norwich Clergy Association, a proclamation read by Mayor Peter Nystrom and a ringing of the city’s Freedom Bell. There will be a moment of silence at noon.

At 7 p.m. at Park Congregational Church, 283 Broadway, an illustrated lecture, “Kathe Kollwitz: Artist as Activist,” will be presented by Amanda A. Douberley, assistant curator and academic liaison at the William Benton Museum of Art at the University of Connecticut. The German artist lost her son early in World War I and it affected her lifetime of art and activism for peace.

International Day of Peace was instituted by the United Nations General Assembly in 1981 to promote peace among all the peoples of the world,” Norwich City Historian Dale Plummer, chairman of the Norwich World War I Memorial, said.

The moment of silence at noon will be observed worldwide Tuesday at noon local time in each time zone, Plummer said.