Early life and education He was born on 3 January 1889 in
Sanok, then within the
Kingdom of Galicia and Lodomeria; the son of
Roman Vetulani, a high school professor, and Matylda
née Pisz (1861–1891). His mother died on 15 December 1891, when Kazimierz Vetulani was less than three years old. He was raised by his father and his second wife, Elżbieta née Kunachowicz. He had five younger, half-siblings: brothers
Zygmunt (1894–1942),
Tadeusz (1897–1952) and
Adam (1901–1976), and sisters Maria (master of economics, clerk of the Agricultural Bank in Kraków, 1895–1945) and Elżbieta (1903–1921, died of tuberculosis). The family lived in Sanok, in the house at Floriańska Street (later renamed Ignacy Daszyński Street) and in the villa of the Zaleski family at Świętego Jana Square. On the matriculation certificate of 15 June 1907, he had an excellent degree in mathematics and Polish language with a notion of a particular passion for those subjects. and then to the rank of
lieutenant on 1 November 1917. Around 1916–1918 he was assigned to the Imperial-Royal railway regiment. In the 1917/1918 academic year, he studied again at the Lviv Polytechnic. In 1918 he built
armoured trains in
Nowy Sącz and
Przemyśl and traveled to the
besieged Lviv. After completing his military service, he settled in
Kraków and started work in a construction company. After the
Peace of Riga of March 1921, he lectured at the Technical College of Railway Forces and at the courses of professional and reserve officers in Kraków. Then he worked as a technical advisor to a number of large companies, enterprises and central and local government institutions as well as private clients. In 1924 he was verified on the list of railway sapper officers in the rank of captain and assigned as a reserve officer to the 1st Railway Sapper Regiment. In 1934, as a reserve captain of the engineering corps and sappers, he was included in a group of
militia officers. He was assigned to the District Officers' Staff No. V and was then on the records of the Poviat Supplementary Command of the City of Kraków.
Work at the Lviv Polytechnic (sits third from the right) in
Milanówek, 1930s Throughout 1920s and 1930s, Kazimierz Vetulani published a number of scientific papers. Kazimierz Vetulani, according to his cousin Janusz Vetulani, was “respected and liked by students of three
denominations and nationalities living in Lviv at the time,” and was “in time warned by Ukrainian students to avoid the area of his apartment for a few days and not stay in it”. Gestapo men showed great interest in the assets of those arrested. Most of the legacy and personal belongings of Kazimierz Vetulani found in his apartment, including some of his writings, were looted or destroyed during and following his arrest. The name of Kazimierz Vetulani (written as “Wetulani Franciszek or Kazimierz”) Banach added that he learned of Kazimierz Vetulani's arrest from Vetulani's cousin. == Scientific work ==