Since the mid-19th century, Moscow has been experiencing a true "dacha boom." According to a decision by the State Council on July 7, 1847, it was permitted to allocate land within a radius of 25 versts from Moscow and St. Petersburg for the construction of factories, plants, and dachas, which were to be beautiful and convenient.

Particularly prestigious was the dacha area along the Petersburg highway, especially Petrovsky Park. Here, in addition to the country houses of Moscow's nobility, there were restaurants and other entertainment establishments. By the early 20th century, dacha construction was actively developing, and large plots began to be divided into smaller ones, accessible to a wider public. The magazine "Razvlechenie" noted in 1889 that representatives of high society, aristocrats, athletes, bankrupt nobles, and doctors visited Petrovsky Park.

In the late 19th century, the plot was acquired by merchant A. M. Postnikov, founder of the "Partnership of A. M. Postnikov's Metal Products Factory," which produced church utensils and cabinet bronze. During his ownership, part of the plot was leased to entrepreneur Sh. Omon. After Postnikov's death, the plot was divided, and the house with the adjacent territory passed to the Moscow manufacturers Konshins, and then in 1914-1915 to I. A. Mantashev, son of a famous oil industrialist and horse enthusiast.

The house at Petersburg Highway, 21 was built in the first half of the 19th century and was reconstructed by architect A. Erikhson for the Konshins. The main facade of the house, designed in a rectangular shape, is adorned with a protruding portico featuring six fluted columns of the composite order, forming an open loggia on the second floor. The composition is completed with a frieze with rosettes and a triangular pediment, richly decorated with modillons, rosettes, and garlands. The basement has rusticated finishing on the sides and smooth in the center, while the second floor is pierced with semicircular and rectangular windows framed by pilasters with composite capitals, architraves, and garlands. To the right of the facade is an open park terrace with a balustrade. Architect F. O. Shekhtel added a two-story wing with large semicircular windows on the first floor and rectangular ones on the second. The interiors retain original decorative elements by Shekhtel: a trapezoidal wooden window, a grand marble staircase with carved floral motifs, and relief panels.

A fence with decorative columns and ornate finials separates the dacha from the avenue. The entrance pylons are adorned with oval cartouches with garlands. After the revolution, apartments for employees of the Zhukovsky Academy were located here, and since 1949, it has been the House of Pioneers. Nowadays, the building has been used as the Museum of Children's Cinema at the Animafilm studio.