The story of the person Robert Arnaud was born on 30 June 1885 in Sigmaringen. After attending high school, he completed a three-year apprenticeship in Heilbronn, which was followed by work in various drugstores and as a representative for Kathreiner's malt coffee. In November 1908 Robert Arnaud acquired a building in the Schwabstraße in Sigmaringen, which was to house the Robert Arnaud city drugstore in the following years. In 1928 the shop was enlarged by an extension in the Bauhaus style. Robert Arnaud's marriage to Amelie Dieringer (1889-1970) in 1910 produced the daughters Gertrud (1911-1990), Hildegard (1912-1995) and Gretel (1916-1995) and his son Robert (1927-1945). Robert Arnaud died on 11 May 1945, shortly after his son had been shot dead during the invasion of Sigmaringen by French troops. Inventory history and report of the researcher Renate Arnaud handed over the available documents to the Sigmaringen State Archives in 2004, 2005 and 2007 (accession numbers 55/2004, 20/2005 and 9/2007). This is an enriched estate with a term of approximately 1871 to 2005. The focus is on the first two decades of the 20th century and the years between 1930 and 1940. Corinna Knobloch recorded the documents in the period from March to July 2006 and in February 2007. During the development 1381 units were formed, consisting among others of 5 master plates, 14 units with correspondence, 1191 postcards or folders with postcards as well as photographs, 4 photo glass plates, 479 collector's pictures of Kathreiner's Kneipp malt coffee, Liebig's Fleisch-Extract, Bernsdorp's Cacao