Leszek Nowosielski (15 November 1918 in Warsaw - 1999) was a Polish artist who worked in conjunction with his wife, Hanna Modrzewska-Nowosielska. They lived in Podkowa Lesna, Poland.

Alongside the graphic arts and easel painting they began to work on porcelain, using "on-glaze painting" to create dinner table sets, vases, plates and other ceramics. Nowosielski created works with historical and architectural motifs. The works were sought after by private collectors, as well as government institutions as gifts for overseas recipients such as General de Gaulle during his visit to Poland. His subject matters ranged from mythology, glazed allegories, monumental figurative compositions, abstract friezes, as well as themes of destruction a...