[3] Between 1871 and 1873, Wojciech studied at the Kraków School of Drawing and Painting (later School of Fine Arts) - under Władysław Łuszczkiewicz, followed by a stint until 1875 at the Munich Academy of Fine Arts, with professors Alexander Strähuber and Alexander Wagner.

[4] Kossak spent the summer of 1939 in Jurata, from where he returned to Kraków at the end of August, where he witnessed the German invasion.

He wrote to a friend: "With the moment of our defeats and the disgrace of this poor Rydz, who was so immature in his role, I lost my heart not knowing that what was my beloved subject, not only has not ceased to be the most popular, but today the most expensive sursum corda has happened".

Portraits and genre scenes were created, such as weddings or hunting, but also sketches for the panorama of Grochów.

He belonged to a new generation of Polish battle-scene artists influenced by the work of his father Juliusz.