Midsummer Carnival Shaft is a public artwork by American architect Alfred C. Clas in the Court of Honor, in downtown Milwaukee, Wisconsin, United States.The Midsummer Carnival Shaft was commissioned by the City of Milwaukee, which chose Alfred C. Clas as the artist to design/construct it.It was built as part of the Milwaukee Midsummer Carnival, an annual festival started in 1898 to honor Wisconsin's semicentennial, but which only lasted until 1901.The sculpture stands nearly as tall as the surrounding buildings, and invites viewers to take notice of it as they pass by, rather than being viewed for long periods of time.As Clas was a local architect and city planner at the time, he was a good choice to create the publicly-located sculpture.