by the mayor of Constance (1546–1548) Sebastian Geissberg. The estate saw a number of owners. In 1817, Johann Baptist von Streng sold it to the exiled Hortense de Beauharnais, the daughter of ex-Empress Joséphine, for 30,000 guilders. As arranged by Napoleon, Hortense had to marry his brother Louis Bonaparte, and the couple were named King and Queen of the Netherlands (1806 to 1810). The royal couple not only suffered with the demise of the rule of Napoleon, but also had an unhappy marriage leading to a separation. Hortense initiated reconstructions and renovations in an attempt to recreate the atmosphere of Malmaison. The surrounding park was possibly designed by Louis-Martin Berthault. In 1818 she moved in. Her brother, Eugène de Beauharnais, bought the nearby Sandegg Castle and built a villa close by. While Hortense initially spent time at her house in Augsburg, Arenenberg soon became her main domicile. At her Parisian-styled salon she entertained many luminaries. Her son Louis Napoléon, the future emperor Napoléon III, who had attended school in Augsburg, visited Arenenberg as a teenager; there he was further educated and then attended the Swiss military academy at Thun, receiving Swiss citizenship. In 1837, while he was exiled and living in New York City, Louis Napoleon received notice of his mother's deteriorating health and returned to Arenenberg. Hortense died on 5 October 1837. After mourning, Louis Napoleon had to leave Switzerland, due to French pressure, and moved to London. In 1843, in need of money to finance his aspirations, he sold the property to Heinrich Keller. Once he was emperor, his empress Eugénie bought it back in 1855. Further renovations were made between 1855 and 1874. After Napoleon III's death, Eugénie visited Arenenberg several times before she donated it in 1906 to the Canton Thurgau. Economy , Salenstein had an unemployment rate of 1.49%. , there were 49 people employed in the primary economic sector and about 16 businesses involved in this sector. 67 people are employed in the secondary sector and there are 16 businesses in this sector. 215 people are employed in the tertiary sector, with 46 businesses in this sector. there were 773 workers who lived in the municipality. Of these, 373 or about 48.3% of the residents worked outside Salenstein while 135 people commuted into the municipality for work. There were a total of 535 jobs (of at least 6 hours per week) in the municipality.