Indeed, it is possible to question whether Matejko was really a historical painter. At a first glance, it would seem he was. But if one looks into his works with more attention to detail, it becomes clear that they lack what is a key quality of such representations, namely, the attention to historical accuracy. Maria Poprzęcka commented on the issue:
In the large format paintings of Matejko there is no unity of space, nor time, nor action. Rejtan is a sum of events, which were in reality separated by some twenty years, Batory spatially connects the Psków and Wielkie Łuki (…) and non-simultaneous events of the fight are portrayed in 'Grunwald'.
There are more such inaccuracies: Anna Jagiellonka who is depicted listening to priest Skarga’s sermon was long dead at the time; Stanisław August, Hugo Kołłątaj and Michał Czartoryski were not in fact present at the gathering in 1773, during which Rejtan made his objection; numerous witnesses depicted in the Prussian Homage (Benthman, Bonner, Anna Mazowiecka) were dead in 1525; and a half-naked warrior who attacks the Great Master with St. Maurice’s spear - a national relic - is highly unlikely.
Thus comes the conclusion that Matejko was hardly a candidate to be a history teacher. And yet, he became such a teacher, and even someone much more significant.