The history and temporary changes in the condition of outstanding artistic monuments in the museum Necropoleis, made of various materials, are surveyed: those to A.I. Kosikovsky (Paolo Catozzi and A.I. Terebenev, sculptors, 1840), E.A. and V.N. Kochubey (A. Costoli, sculptor, 1856), A.Ya. Okhotnikov (F. Thibaut, sculptor, 1800s), M.V. Lomonosov (J. Stälin, author of the design, 1766), V.V. Stasov (I.Ya. Ginzburg, sculptor, I.P. Ropet, architect, 1908), P.V. Kindyakov (Paolo Catozzi, sculptor, 1828), N.M. Karamzin (of unknown authorship, 1820s) and E.A. and E.N. Karamzin (of unknown authorship, 1850s), A.Ya. Potemkina (of unknown authorship, 1830s). The materials of the monuments are described, the results of restoration work and dated materials science analyses are given.