 According to E. I. Krasnova, who got the Antsiferov Prize and is the author of many scientific historical discoveries, Musin-Pushkin's study and his richest collection were placed in the stone annex.Doctor of History V. S. Sobolev and director of Russian State Navy Archive Doctor of History E. V. Anisimov, who is a senior research assistant of Saint-Petersburg Institute of the Russian Academy of Sciences, support that point of view