Institute of Philosophy of the University of Warsaw (Polish Instytut filozofii Uniwersytetu Warszawskiego) is a research institution located in Warsaw, part of the Faculty of Philosophy and Sociology of the University of Warsaw. It is renowned mainly for its contribution to the development of modern logic and analytic philosophy (Lvov-Warsaw School - Alfred Tarski, Jan Łukasiewicz, Kazimierz Ajdukiewicz, Tadeusz Kotarbiński, Stanisław Leśniewski) and to history of ideas (Warsaw School of the History of Ideas - Władysław Tatarkiewicz, Stanisław Ossowski, Maria Ossowska, Leszek Kołakowski, Adam Schaff). Provides master's degree studies, doctor's degree studies and postgraduate studies in philosophy both in Polish and in English.