When Jan Matejko unveiled Skarga's Sermon in 1864, it was immediately recognized as a bold political statement disguised as a historical tableau. Painted in the shadow of the failed January Uprising against Russian rule, the work stirred Polish hearts by recalling a moment of warning and crisis from the nation's past. The painting centers on the legendary sermon delivered by the Jesuit priest Piotr Skarga in the early 17th century, a speech that, according to tradition, condemned the moral decay and political infighting of the Polish nobility.

Though historians debate whether Skarga ever delivered such a sermon in precisely this form, the image became an emblem of patriotic conscience and a rallying cry for reform. In the crowded, dimly lit chamber, Skarga stands at the pulpit, his hand raised in urgent admonition, while the assembled magnates and royals react with a mixture of indifference, discomfort, and defiance. The king, Sigismund III Vasa, sits in silent contemplation, his crown and scepter symbols of power weighed down by responsibility. Around him, the nobles' ornate chains and rich robes signal their status but also their detachment from the priest's warnings.

Matejko's composition draws the eye to the contrast between Skarga's passionate gesture and the nobles' closed, even hostile, body language—a visual indictment of political apathy. Unlike Rembrandt's biblical scenes, where light often redeems the figures, here Matejko uses shadow to emphasize the moral darkness he saw in Poland's ruling class. Skarga's Sermon was not created for a royal patron or church, but rather as a private act of national reflection by Matejko, who was then just 26 years old. The painting quickly became famous in Polish circles, exhibited in Kraków and later Warsaw, and helped establish Matejko as the leading historical painter of his generation.

Its fate during the turbulent years that followed is less documented, but today it is held by the Royal Castle in Warsaw, where it continues to spark debate about history, memory, and the artist's role as a moral voice. For Matejko, this canvas marked the beginning of a lifelong project: to paint the conscience of a nation through its moments of crisis and hope.