His customers included the Dukes of Mecklenburg and Oldenburg, Prince Liechtenstein, and the Jockey Club.

After his death in 1902, his widow Gisela and their four children Anna, Auguste, Fritz and Susanna took over the business.

In 1910–1913, the current store at Graben 13, one of the most famous Viennese business streets in the city center, was designed by architect Adolf Loos and remains almost unchanged to this day.

[2] Loos also designed the branch in Karlovy Vary (1921), the store on Wilhelmstrasse in Berlin (1924) and the annex at 149 Champs-Elysees in Paris (1927–1928).

He transferred the image of polo to Kniže Ten products, an exclusive range of toiletries for men.

[3] In the post-war period, Kniže lost its branches in Karlovy Vary and Prague due to the Soviet Union's "Iron Curtain".

From 1992 to 1993, architect and designer Professor Paolo Piva renovated the second floor and the historic Loos salons.

For example, Oskar Kokoschka paid for his suits with paintings, blouses were made for Marilyn Monroe, shirts for Kurt Tucholsky, ski pants for Josephine Baker, and fragrances for James Dean.

Marlene Dietrich also had tails tailored at Kniže for her stage shows, and Billy Wilder paid a long visit to the house during his last stay in Vienna.

Customers also included Maurice Chevalier as well as Laurence Olivier, Willi Forst and Fritz Lang, and primarily business leaders and aristocrats such as King Juan Carlos of Spain.