The scale and nature of the impact of the imperial residence in St. Petersburg on the urban environment of the city center are considered. It is noted that St. Petersburg was a residence city for two centuries, which significantly affected its development. It is emphasized that the Winter Palace was not considered the center of city-planning composition of citywide significance, but gradual development of the residence according to the growing needs of the imperial family had decisive effect on formation of a large area in the historical nucleus of the city. Periodization for evolution of the area and imperial palace complex is suggested. It takes into account changes in its location in St. Petersburg and its functions, and clearly demonst...