Marianne Doezema of the Mt. Holyoke College Art Museum will deliver a lecture on "Realism and Resonance: The Urban Landscape in George Bellows' Art." Her talk accompanies the Mead Art Museum's exhibit titled "George Bellows: A Ringside Seat." The exhibition features an array of the American artist's works including nitty-gritty urban images and family portraits. (Thurs., 4 p.m., Stirn Auditorium. No admission charge.)

The Constitution and the Imagining of America (CIA) will present a colloquium on "Imagining a New Constitution for the United States." The colloquium begins Friday and continues through Saturday with such topics as "Civil Liberties in Wartime," "Judicial Selection in the 21st Century" and "Constitutional Futurology." Guest speakers include the directors of the Center for American Progress and the Alliance for Justice. (Fri., 3:30 p.m., Alumni House. No admission charge.)

Come enjoy an evening of poetry, dance and electronic keyboards when the Amherst College Music Department and Live in Concert, Inc. stage "Itasca: A Poem for Voices & Live Electronics." The production, which is based upon Henry Schoolcraft and Oza Windib's Mississippi River expedition, makes its East Coast premiere right here on campus. (Sun., 3 p.m., Buckley Recital Hall. No admission charge.)

Celebrate Constitution Day with tongue-in-cheek award-winning author, filmmaker and media researcher Kembrew McLeod. In "Culture, Inc.: How Intellectual Property Erodes Freedom of Expression," McLeod will present a lecture on intellectual property laws and their effects on a variety of subject areas, highlighting the lecture with clips from his upcoming documentaries. The communication studies professor at the University of Iowa is a known media trickster and master of irony, and has even tried to place copyrights on the term "freedom of expression." (Mon., 7:30 p.m., Cole Assembly Room, Converse Hall. No admission charge.)