Together with
Kazimierz Stabrowski,
Xawery Dunikowski,
Konrad Krzyżanowski and
Karol Tichy, Ruszczyc helped develop the
Warsaw School of Fine Arts, where he taught for a while. One of his students was the famous Lithuanian symbolism painter
M. K. Čiurlionis. In 1907–08 he held the chair of landscape painting at the
Kraków Academy of Fine Arts. In 1908, with
Józef Mehoffer, Ruszczyc organized an exhibition of Polish painting in Vienna. He then settled in
Vilna (Vilnius), where he devoted himself to teaching. One of his students of that time was famous Russian and Soviet sculptor
Isaac Itkind. Ruszczyc also organized cultural events, and worked as a graphic designer, poster designer and illustrator. As a costume designer, he participated in several performances of the municipal theater, and he was a member of the "Committee for the Conservation of the Adam Mickiewicz Monument". In 1918 and 1919 he participated in the founding of the Faculty of Fine Arts at
Stefan Batory University, where he was elected as the first dean.
Czeslaw Znamierowski was one of his most notable students there. ==Selected paintings==