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During its first few years of operation, the local newspaper usually referred to it as "New Hall." Around 1869, it started to be called the Opera House. The Croswell has gone by many different names. During the 19th century it hosted performances by Edwin Booth, John Philip Sousa, and Buffalo Bill Cody the early 20th century saw appearances by Mrs. Anthony, Elizabeth Cady Stanton, Frederick Douglass, Thomas Nast, Henry Ward Beecher, and Ralph Waldo Emerson. Famous speakers who visited the opera house included Susan B. It hosted concerts, lectures, festivals, and theatrical performances by both traveling troupes and amateur local groups.
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The hall served many functions during its early years. Its first public event, taking place on March 19, was a lecture by temperance advocate John Bartholomew Gough. It was financed by the Adrian Union Hall Company, whose stockholders included future Michigan governor Charles Croswell. The Croswell Opera House, or Adrian Union Hall as it was originally called, was completed in 1866.
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