Mariusz Zaruski (1867 - 1941) was a Brigadier-General in the Polish Army, a pioneer of Polish sports yachting, an outstanding climber of the winter and caves of Tatra Mountains.
The stamp was issued in miniaturesheets of 9 stamps.
Poland 2017, Mariusz Zaruski.
The mountain in the background is Mt. Świnica (2'301 m) on the Polish-Slovak border.