 Sometimes the word "Royal" was omitted.Though the Society was founded in 1800, its traditions harked back to the Thursday dinners that had been held in the final decades of the 18th century by Poland's last king, Stanisław August Poniatowski.From 1824 the Society was headquartered in the Staszic Palace (after its renovation in 1820–23), purchased for the Society by one of its most prominent members, Stanisław Staszic.