In 1817 the Saxon Palace was requisitioned by Warsaw's Russian governor for military use, and the Warsaw Lyceum was reestablished in the <answer>Kazimierz Palace</answer> (today the rectorate of Warsaw University). Fryderyk and his family moved to a building, which still survives, adjacent to the <answer>Kazimierz Palace</answer>. During this period, Fryderyk was sometimes invited to the Belweder Palace as playmate to the son of the ruler of Russian Poland, Grand Duke Constantine; he played the piano for the Duke and composed a march for him. Julian Ursyn Niemcewicz, in his dramatic eclogue, "Nasze Przebiegi" ("Our Discourses", 1818), attested to "little Chopin's" popularity.
The Warsaw Lyceum was moved to where?
Kazimierz Palace