The Union Block of Mount Pleasant, Iowa, was built by William McCandless in 1861.

In the Union Block in 1869, Arabella A. Mansfield became the first woman in the United States to be awarded a license to practice law.

Early supporters of women's rights and civil rights spoke there, including Frederick Douglass, Bronson Alcott, Anna Dickinson, and possibly Elizabeth Cady Stanton.

The ballroom was restored and updated on the third floor making it a hall used for a variety of community gatherings, events, and private parties.

This article about a property in Henry County, Iowa on the National Register of Historic Places is a stub.