The wing is part of a city estate from the 17th and 19th centuries, which is recognized as a federal cultural heritage site.

The estate, located at the intersection of Armenian and Sverchkov alleys, has a rich history, both in terms of its owners and construction. The 17th-century chambers, possibly belonging to the boyar Miloslavsky, became the foundation of the estate house, which was then repeatedly rebuilt. Since 1790, when the estate passed to the princes Gagarin, its transformation in the spirit of Moscow classicism was undertaken by the famous architect M.F. Kazakov. He created a classical composition with the main house set deep into the plot and symmetrical wings pushed to the line of Armenian alley.

Later, the estate was owned by the Tyutchevs, and the poet Fyodor Tyutchev lived here. Subsequently, the building was used for various social institutions, from the Gorikhvostov almshouse to the Soviet "House of Social Welfare named after Nekrasov" in the 1920s, which Ilf and Petrov described in the novel "The Twelve Chairs" as "2nd House of Starsobesa." However, the overall composition of the estate has remained unchanged, and today it looks as M.F. Kazakov intended.

The southern wing, facing Armenian alley, differs from the northern one in that it is connected to the main house of the estate. Behind it is a narrow courtyard, isolated from the main courtyard by surrounding buildings. The southern wing is set back from the property line, leaving space between it and the neighboring building.

From the side of Armenian alley, the southern wing, like the northern one, is a one-story building with five window axes. The center of the facade facing the alley is highlighted by a small risalit. A characteristic feature of 18th-century architecture, related to early Russian classicism, is the vertical niches for windows. They are visible on both the facade and the walls facing the estate courtyard. The facades of the building connecting the southern wing to the main house, which is positioned perpendicular to the alley, are similarly designed. The difference in the number of window axes with the "symmetric" northern wing (5 and 7 respectively) may indicate that M.F. Kazakov was reconstructing already existing buildings according to classical canon in the 1790s.