Fine art painter and draughtsman.
In the age of two, the Kowner family had reached Lodz.
His first painting education was in Kiev (1912-13), then
in Dusseldorf (1917-18). During 1919-1939 he again lived
in Lodz. He was a member of Group of Artist named Start,
he also joined the editorial board of journal entitled
Forma, which was dedicated to fine arts. Public presentation
of his works of art started at the Municipal Gallery in
Lodz in 1928. Later he took part in several exhibitions
(1932, 1936, 1937, and 1939). He was moved to the Litzmanstadt
Ghetto, then in 1944 transported to Auschwitz. Kowner
belonged to small group of Jewish artists from Lodz who
survived the German occupation. After the World War II
he travelled to Sweden when after a period of convalescence
he became a teacher of fine arts.
He was an author of symbolic compositions, still-lifes,
and landscapes especially presented courts and architecture