In 2011 he wrote a book as a response to the controversial book "Germany Abolishes Itself" written by former member of the Executive Board of the Deutsche Bundesbank - Thilo Sarrazin.
In a 2004 letter to Berlin mayor Klaus Wowereit, Mahmoud Ahmadinejad (the mayor of Tehran at that time) objected to the commemorative plaque in front of the restaurant, calling it an insult to Iran.
Klaus Kinski | Klaus Schulze | Klaus Badelt | Klaus Barbie | Klaus Nomi | Klaus Mertens | Klaus Huber | Klaus Ebner | Václav Klaus | Klaus Ploghaus | Klaus Maria Brandauer | Klaus Knopper | Klaus Fuchs | Vaclav Klaus | Klaus Theweleit | Klaus Schwab | Klaus Biesenbach | Klaus Allofs | Klaus | Klaus Zmorek | Klaus Zehelein | Klaus Wowereit | Klaus Roth | Klaus Rifbjerg | Klaus Nordling | Klaus M. Leisinger | Klaus Meine | Klaus Klostermaier | Klaus Hoffmann | Klaus Hildebrand |