He was born in Kraków. His father was a
Lemko of
Greek Catholic rite and came from Odrzechowa in the
Sanok district, his mother Anna Harnlender was a Pole with German roots. He was well known for his religious compositions (
wall paintings,
iconostases,
polychromies) in the
Eastern Orthodox Churches in
Kraków,
Białystok, and
Jelenia Góra, the
Roman Catholic Church of the Holy Cross at
Wesoła, the
Franciscan Church in the Azory district of Kraków, and the
Greek Catholic Church in
Lourdes, France. Nowosielski designed and erected the
Church of the Birth of the Blessed Virgin Mary in Biały Bór. He also painted portraits, landscapes, still lifes, and abstract pictures. His works are found in Polish museums and in private collections in Canada, the US, and Germany. In 1988 he received
Jan Cybis Award. In 1993, he received the Commander's Cross of the
Order of Polonia Restituta and was also awarded a prize by the Polish cultural foundation Wielka Fundacja Kultury. In 2000, he received an
honorary doctorate from the
Jagiellonian University. In 2008, he was awarded the Gold
Medal for Merit to Culture – Gloria Artis. In 2022, a unique ceramic mosaic depicting St Francis of Assisi by Nowosielski created in 1980 was discovered in the Warsaw district of Izabelin and added in 2023 to the register of cultural property due to its artistic and historic significance. ==Remembrance==