thumb|Gustav Peichl museum roofscape
Gustav Peichl (18 March 1928 – 17 November 2019) was an Austrian architect and caricaturist.
Life
He studied at the Academy of Fine Arts Vienna until 1953 and worked in the office of Roland Rainer. To pay for architectural school, he drew caricatures under a pseudonym to protect his identity from the Red Army, which occupied Austria at the time. He first used the name Pei initially and later by the name under which he was best known, Ironimus. He later drew cartoons for major newspapers such as Kurier, Express, Süddeutsche Zeitung and Die Presse.