Leszek Nowosielski, Decorative platter with the coat of arms of Wroclaw, 1960s.

Biography
Graduated from the Faculty of Chemistry at the Warsaw University of Technology, during World War II he attended private painting lessons with Jan Rubczak. In 1945 he moved to Gliwice, where he ran a chemical factory until 1949. In 1949 he became a member of the Association of Polish Artists and Designers, the same year Leszek Nowosielski's first solo exhibition of paintings took place at the Bureau of Artistic Exhibitions. In 1956 he turned his interest to ceramics, starting with glazed decorations placed on porcelain. Later he specialized in figurative compositions created from relief ceramic tiles (panels). He created abstract decorations using also painting on porcelain, part of his work referred to the history of Poland, including the Battle of Grunwald, the Katyń Massacre, the Warsaw Uprising, martyrdom in Auschwitz. Leszek Nowosielski's works were characterized by vivid colors, some of them are three-dimensional figures made by hand and unique in their form. The artist's work can be found in the collections of the National Museum in Warsaw, Wroclaw and Gdansk, the Mazovian Land Museum in Plock and the Warsaw Archeological Museum.

One of the ceramic compositions Leszek Nowosielski dedicated to the explosion of the nuclear bomb in Hiroshima, this work is in the Hiroshima Memorial Center in Tokyo.

Leszek Nowosielski's wife was Hanna Modrzewska-Nowosielski, both lived in Podkowa Leśna for many years.