Российская государственная библиотека
In 1929, Mashkov and sculptor Nikolay Andreyev erected the neoclassical monument to Aleksandr Ostrovsky near Maly Theater. Mashkov continued surveying memorial buildings (some of them already scheduled for demolition) and headed the restoration of Pashkov House (then known as Rumyantsev Museum, later Lenin Library and Russian State Library). He took no part in architectural disputes of 1920s, but was present in professional journals and wrote college textbooks (1935).