The main house of the Pozdnyakov estate, bright and festive, stands out against the backdrop of the buildings on Bolshaya Nikitskaya Street. Special attention is drawn to the herms in the central windows of the second floor, which face each other.

The modern appearance of the building was formed gradually, over three construction periods and under three different owners. The two-story mansion was built in 1860 under Lieutenant N.I. Pozdnyakov.

In 1892, architect P.A. Ushakov, at the request of the widow of hereditary honorary citizen V.S. Volkov, added residential and income-generating extensions to the courtyard facades. At that time, entrance gates and a fence were built in a unified style with the house, which have survived to this day. In 1907, architect E.I. Zelensky added a dome over the right part of the building for the new owner, hereditary honorary citizen Gribov.

The planning structure of the site has remained the same as in 1860. This is an example of a small urban estate from the second half of the 19th century, which emerged on a territory known since the 17th century.

Information about the house during Pozdnyakov's time can be found in the appraisal report of 1869: a two-story stone building with a basement, where the kitchen and a "spirit oven under the vault" were located. The basement was faced with white stone. The first floor had stoves, and on the second, an iron fireplace; the floors of the second floor were parquet. The house had three staircases and water closets. According to the description from 1873, the upper floor was occupied by the owner Ilya Nikolaevich Pozdnyakov, the son of the house's builder, while his mother occupied eight rooms on the lower floor, and two more rooms were used as the office of a brick factory.

No internal changes were made until the early 20th century. The main facade has been well preserved to this day. The 1860 project featured a characteristic three-part structure and decor typical of early eclecticism. The facade rests on a high smooth basement, the first floor is highlighted by deep rustication, and the second by a thin band. A finely profiled cornice runs between the floors. The facade is completed by a developed crowning cornice, supported by a decorated frieze with flat attic in the form of a balustrade and a semicircular stucco cartouche above the central axis. The window openings have different finishes and are richly framed in the central part of the second floor with stucco archivolts, while on the sides, with Corinthian order pilasters with complex pediments. The central part of the building is highlighted by a slightly protruding risalit. The house, rich in details, looks lush and festive.

From the street, the western end of the building is partially visible, decorated more modestly: smoothly plastered, with crowning and inter-floor cornices; the window openings of the third floor have arched finishes and are framed by simple casings. The facade is flanked by flat pilasters.

Today, this building houses the Embassy of Tanzania.