The author discusses Franciszek Prochaska born on 27 June 1891 in Brzozów, a figure unacknowledged in 20th-century Polish art. The artist is not rated among eminent ones, therefore the interest in his art is slight. Few of his works are known; all the known paintings are kept at the Historical Museum in Sanok. His art works hardly ever appear on the Polish art market. There aren’t any paintings by him in any other museum than the one in Sanok. His prints are far better known; apart from Sanok, they can be found in the National Museum in Warsaw. His woodcuts and illustrations have been discussed in publications by Maria Grońska: Nowoczesny drzeworyt polski and Grafika w książce, tece i albumie.