Images 
 ... are here (http://www.cpic.ru/ByTheWay/AllNotes/Nov3-.htm). Pictures are PD because they are old. It is less trivial with sculptures. Modern Russian law explicitly states, though, that object permanently located in public places are not protected. The question remains whether the author of the photo of the sculpture has any copyright claim. In US he does if he pictures a 3-d image (sculpture, palace) and he doesn't if he captures a 2-D image (that is taking photo of the painting doesn't generate a copyright for the photo itself). Could be that photos of these sculptures are still PD because of the above quirk or RU-law. Hope this helps,