The paper shows scientific career of Adam Vetulani and Jakub Sawicki. It also shows the way of appointing ancient polish law and ecclesiastical law departments in Second Polish Republic through their achievements. After the example of German countries, department (full or assistance) wasn't unit of faculty, but in fact permanent employment for the professor. In period between two World Wars President of Polish Republic nominated scientists to be chiefs of department. In addition there was also a possibility to stipulate scope of duties in an agreement. There was no title of professor, because somebody who had abandoned department wasn't professor there any more. One of the ways to be nominated on department was getting so called "veiniam legendi" , which meant right to give lectures and to be assistant professor. Legal basis for such resolution were two University Acts: first dated 13th of July 1920, and the second 15th of March 1933. A. Vetulani was professor of history of polish law at the Jagiellonian University. J. Sawicki was assistant professor of ecclesiastical law at USB. A. Vetulani was proposed as the candidate for ecclesiastical law department in Cracow. But Ministry of Religion and Education delayed confirmation of application, due to insufficiency of scientific achievements of the candidate. It was also emphasized that A. Vetulani had been already assistant professor of history of Polish law. After completing scientific achievements A. Vetulani received nomination. In addition in 30'ties of XX century he got proposition from University of Warsaw. It wasn’t easy for friends. After habilitation in Wilno, J. Sawicki worked as a clerk and he wasn't employed by any university. In that time University of Warsaw offered department of canonical law to A. Vetulani. In the end A. Vetulani didn't move to Warsaw, whereas J. Sawicki delivered commission lectures.