Part of Armorial Hall in the Winter Palace. 1838. French/Russian. Oil on canvas. Collections of the Hermitage Museum, Saint Petersburg. In the public domain in the United States because the artist died over 70 years ago. via https://commons.wikimedia.org/wiki/File:Adolphe_Ladurner_-Part_of_Armorial_Hall_in_the_Winter_Palace(1838).jpgParade on the Palace Square in Saint Petersburg. 1855. French/Russian. Oil on canvas. Signed and dated on the lower left. Collections of the State Historical Museum, Moscow. In the public domain in the United States because the artist died over 70 years ago. via https://commons.wikimedia.org/wiki/File:Adolphe_Ladurner_-Parade_on_the_Palace_Square_in_StPetersburg(1855).jpg Fencing Scene. 1827. French/Russian. Oil on canvas. Image source Roy Miles Fine Paintings. In the public domain due to age. via https://www.art-prints-on-demand.com/a/ladurner-adolf/a-fencing-scene.html