House No. 12, building 1 on Pyatnitskaya Street, is a preserved wing of the former urban manor. It previously included the main house located deep in the courtyard and two wings built at the end of the 18th century, which faced the street line of Pyatnitskaya. In the fire of 1812, the wings were only slightly damaged and were fully restored five years later, with their sizes slightly increased. In the 1820s, following the Empire style trend, the owner of the manor, Serpukhov merchant V.V. Vargin, added wooden mezzanines to the wings. In 1845, the new owner B.V. Vargin added a small volume to the building, protruding along the new street line, creating a noticeable step on the facade.

In the mid-19th century, the first floor of the wing housed five rooms and two kitchens, while the mezzanine contained another living space. In 1871, D.I. Vargin sold the manor to E.A. Baranova, a hereditary honorary citizen. From 1885, some rooms were rented out as shops, and by 1900, part of the wing was occupied by the shops of merchant Kozyrev, who sold lamp oil. In 1907, due to changes in the street line, the second wing on the right was demolished, and a stone fence with a wrought-iron grille was built in its place, altering the classical composition of the manor. Four years before the revolution, a stone volume of square shape was erected in place of the wooden extensions on the western part of the building.

In the 1920s, all the buildings of the manor were converted into communal apartments. The main house (Pyatnitskaya Street, 12, building 2) was raised by four floors. During the Soviet era, the building was restored, and its decorations were partially restored.

In 1985, a branch of the L.N. Tolstoy Museum opened in the wing. There is an opinion that Tolstoy rented this house in the autumn of 1857, but there is no documentary evidence for this. It is known that he rented one of the buildings of the Vargin manor, but it was another house that overlooked the Church of St. Paraskeva Pyatnitsa. Today, the Tolstoy Center on Pyatnitskaya Street hosts exhibitions, children's programs, meetings with cultural figures, and concerts. The wing has remained largely unchanged and is an example of a merchant manor from the 19th century.