From the BRIC website:
Based on actual 18th-century texts, anatomy theater follows the astonishing progression of an English murderess: from confession to execution and, ultimately, public dissection before a paying audience of fascinated onlookers. Through the miracle of opera, she sings through it all. anatomy theater conjures a time when “specialists” traveled from town to town in pre-modern Europe, conducting public dissections of the corpses of executed criminals, seeking evidence of moral corruption in the interior of the human body. It is an idea that resonates today when, out of fear, we assign evil to some bodies and not others. Written by Pulitzer Prize-winning and Oscar-nominated composer David Lang and world-renowned visual artist Mark Dion, anatomy theater is a tuneful and grisly theatrical event.
Here's a wonderful short interview with David Lang from this summer on NPR where he discusses the piece: