Cossacks in Service to the Tsar and Fatherland: From the 16th Century to 1917, an exhibition on the middle floor of the Cameron Gallery in the Catherine Park covering the history and traditions of the Cossacks, their inextricable connection with the history of Russia and the defense of its borders, their participation in wars and discovering new lands, their civilian life, and the national and social composition of the Cossack troops.