Which Polish Romantic poet wrote the national epic 'Pan Tadeusz'?

The Polish Romantic poet who wrote the national epic Pan Tadeusz was Adam Mickiewicz.

Mickiewicz published Pan Tadeusz in Paris on June 28, 1834, while living in exile. Its full title describes it as a tale of the nobility in Lithuania during 1811 and 1812, and the poem portrays a society shaped by memory, patriotism, family rivalry, and hopes for national freedom.

Although the poem is called Poland’s national epic, its setting reflects the older Polish-Lithuanian Commonwealth. Mickiewicz was born in territory that had belonged to the Grand Duchy of Lithuania, and the poem opens with an invocation to Lithuania. That historical background explains why the work matters to Polish, Lithuanian, and Belarusian cultural traditions.

Pan Tadeusz contains twelve books and roughly 10,000 lines written in Polish alexandrines. It became compulsory reading in Polish schools and has been translated into dozens of languages. The other listed poets were major Polish Romantics, but none wrote this particular epic.