The reverse of the coin presents a bust of Stanisław August Poniatowski. On the obverse there is an image of the eagle established as the national emblem of the Republic of Poland. Stanislaw August Poniatowski was the king of Poland in the years 1764-1795, the last ruler of the Republic of both nations. The assessment of his reign remains the subject of disputes. Appreciated as the initiator and co-author of the political reforms carried out by the Four-Year Sejm, one of the main authors of the Constitution on 3 May, and as a patron of science and art, Stanislaw August Poniatowski is also criticised for the fact that he was elected to the Polish throne thanks to the support of the Russian Empress Catherine II, and that he did not manage to prevent the partitions and the consequent collapse of the Republic.