On 26 September 1876, he founded the detergent factory "Henkel & Cie" in Aachen together with the owners of the Rheinische Wasserglasfabrik "Scheffen und Dicker".
[1] He also built in Rengsdorf a guest house that served as a recreation home for employees of the company; he supported the community in many ways.
The couple had four children: On 1 March 1930, Fritz Henkel died at the age of 81 after a short, serious illness at his country residence in Rengsdorf.
The tomb is a pavilion-like, open-fronted rotunda of shell limestone with a glazed dome, which is reminiscent of a Greek temple of the Monopteros type, was built around 1925 by the architect Walter Furthmann.
[3] The tomb's female figure in white marble is a neoclassical late work by the sculptor Karl Janssen, who died in 1927.