Queer Places:
Lingnerschloss, Bautzner Str. 132, 01099 Dresden-Loschwitz, Germany
Schloss Tarasp, Sparsels 145, 7553 Tarasp, Switzerland

Karl August Ferdinand Lingner (December 21, 1861 - June 5, 1916) was born on December 21, 1861, in Magdeburg, Germany, as the third son of a merchant. He attended the city's Higher Trade School before moving to Gardelegen in the Mark Brandenburg region at the age of fifteen to work as a shop assistant. In 1883, Lingner moved to Paris with the ambition of studying music at the Paris Conservatoire and working as a sales representative for German companies. When those plans failed and left him penniless, he returned to Germany in 1885 and settled in Dresden, where he found employment as a correspondent at the Seidel & Naumann sewing machine factory.

In 1888, Lingner founded the company Lingner & Kraft alongside engineer Georg Wilhelm Kraft in a humble garden shed on Wölfnitzstraße, producing novelty items such as back scratchers, steel rulers, and pen cleaners before Kraft departed in 1892. Following several years of research, his friend and chemist Richard Seifert offered him an antiseptic formula in 1891 or 1892, capitalizing on the emerging field of bacteriology. Recognizing that the oral cavity was the main entry point for pathogenic bacteria, Lingner produced "Odol"—derived from the Greek word for tooth and the Latin word for oil—which met a massive public demand for protection against invisible germs and sold exceptionally well. On October 3, 1892, he founded the Dresden Chemical Laboratory Lingner, later operating as Lingner-Werke from 1912 onward with headquarters at Nossener Straße, establishing a global manufacturing system that made him a co-founder of the modern branded goods industry and industrial advertising.

Amassing a fortune in the tens of millions from nothing, Lingner adopted a princely lifestyle that drew both admiration and social resentment in Wilhelmine society. He was a member of the elite Imperial Motor Yacht Club, drove a Mercedes as chairman of the Saxon Automobile Club, and caused a stir with his motor yacht during Kiel Week. His lavish parties, organ playing, two illegitimate children—including Charlotte Serda, born in 1910 from his relationship with actress Julia Serda—and apparent male friendships generated significant public attention. Within the Wilhelmine honor system, he rose to the rank of Excellency, though the anticipated title of nobility eluded him. His male friendships and social circles included a notable connection to Ernest Louis, Grand Duke of Hesse, reflecting elite networks of the era. Lingner's real estate holdings included the Villa Stockhausen in Dresden (known as Lingner Castle) and Tarasp Castle in Switzerland, which he purchased in 1900 as a dilapidated fortress for 20,000 francs and extensively restored, though he died before moving in or seeing his custom Jehmlich salon organ installed.

Drawing from his work with disinfection practices, Lingner dedicated a large portion of his fortune to public health education, social hygiene literature, and charitable institutions. His major contributions included helping found the German Association for Public Hygiene, organizing the 1903 exhibition on common diseases, and mounting the monumental first International Hygiene Exhibition in Dresden in 1911, which drew over five million visitors and established him as a pioneer of modern public hygiene education. His knack for backing modern projects led to the creation of the children's polyclinic with an infant home in Johannstadt, the world's first infant hospital, dental and disinfection hygiene offices, the Dresden Reading Hall, the German Hygiene Museum in 1912, and the Saxon Serum Works Dresden in 1910 or 1911, which supplied healing serum to troops during the First World War.

In 1915, he founded the Political-Scientific Archive in Berlin to strengthen Germany's international standing, and statesman Gustav Stresemann even envisioned him as a future German ambassador. However, Lingner died in Berlin on June 5, 1916, at the age of 54, following surgery for tongue cancer. The Lingner Foundation, established through his will, ensured the continued existence of his charitable works. He bequeathed his last residence, Villa Stockhausen, to the city of Dresden for the public benefit, and his remains were eventually transferred from the Johannisfriedhof to a mausoleum at Lingner Castle. Reflecting the closeness of his bond with Ernest Louis, Grand Duke of Hesse, Lingner ultimately left his Swiss estate, Tarasp Castle, to the Grand Duke upon his passing, though the Hesse family did not permanently reside there and later sold it.

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