The article is dedicated to the study and educational activity in the field of constitutional law at the Jan Kazimierz University in Lvov. It cover the period from the setting up the Law Faculty in 1784 until 1939, i.e. the beginning of WW II in result of which Lvov was incorporated to the Soviet Union. The most space was devoted to professor Stanislaw Starzynski - the master and doyen of Lvov constitutionalists. He was not only an eminent scholar, but also a politician. In 1883, he gained his habilitation in Austrian political (i.e. constitutional) law and in 1889 he took, for the first time in history, the Polish chair of constitutional law (Polish because of it was in a Polish university and with the Polish as a language of instruction). The article familiarizes us with his considerable scholarly achievements, almost forgotten. The next part of the article deals with publications on constitutional law written by Professor Starzynski's students, including: Edward Dubanowicz, Ludwik Ehrlich, Antoni Wereszczynski and Zdzislaw Próchnicki, as well as the contribution to the study of law made by the young generation of Lvov constitutionalists, in particular by a promising associate professor of law Zenon Wachlowski (murdered in the Soviet Union in 1940). Reference is also given to the achievements in the field of constitutional law made by outstanding scholars-specialists in other branches of law, e.g. eminent penal-law expert Professor Juliusz Makarewicz. The article is the first complete attempt of review of the achievements of scholars associated to the Law Faculty of the Jan Kazimierz University in Lvov, a prominent and active academic centre of constitutional law in the inter-war period in Poland.