Бенуа Н. Л. и Кавос А. К. Проект Зимнего сада перед Инженерным замком в Петербурге, between 1851 and 1852

Project of the winter garden in front of the engineers' castle in st. Petersburg. Variants. Plans, facades, sections. Ink, pencil, watercolor. 1851-1852. Date: between 1851 and 1852.