The Swedish soprano Jenny Lind, often known as the "Swedish Nightingale", was one of the most highly regarded singers of the 19th century. At the height of her fame she was persuaded by the showman P. T. Barnum to undertake a long tour of the United States. The tour began in September 1850 and continued to May 1852. Barnum's advance publicity made Lind a celebrity even before she arrived in the U.S., and tickets for her first concerts were in such demand that Barnum sold them by auction. The tour provoked a popular furore dubbed "Lind Mania" by the local press, and raised large sums of money for both Lind and Barnum. Lind donated her profits to her favoured charities, principally the endowment of free schools in her native Sweden.