The mansion on Starokonyushenny Lane, built in 1898 for the family of merchant Nikolai Ivanovich Kazakov, was designed by architect Karl Karlovich Gippius. Gippius, known for his work on facades and interiors, including the Perlov Tea Shop on Myasnitskaya, created designs for many prominent Moscow merchant families, such as the Bakhrushins, Perlovs, and Kazakovs.

For Kazakov, the architect developed a two-story mansion in the Franco-Belgian Art Nouveau style. This style is characterized by smooth lines and floral ornaments, including female masks that adorn this house.

The facade of the building is designed modestly yet elegantly: horizontal rustication, expressive window surrounds, stucco friezes, and masks in the form of female heads. The entrances are symmetrically decorated with metal canopies featuring floral motifs. The central part of the facade is highlighted by a false bay window with a semicircular niche, adorned with a stucco composition depicting a female head and an iris flower.

The house was designed to accommodate two apartments, each with a separate entrance: one for the owner's family and the other for rent. The interior decoration of the mansion has mostly been preserved: ceiling stucco typical of Art Nouveau, original parquet flooring, panel doors, and stair railings featuring thistle motifs.

Nikolai Ivanovich Kazakov, the client of the mansion, was a tea merchant and collaborated with the Perlovs, with whom his family was also related. Innokentiy Ivanovich Kazakov, a family representative, was the son-in-law of Sergey Vasilyevich Perlov, the owner of the Tea House on Myasnitskaya.

At one time, the rented apartment was home to Yelizaveta Pavlovna Morozova, a well-known philanthropist and widow of David Abramovich Morozov. Later, industrialist and banker Nikolai Alexandrovich Vtorov lived here, who moved to his new mansion on Spasopeskovskaya Square in 1914, now known as 'Spaso House.'

After the revolution, the house was nationalized and used for diplomatic purposes. In 1925, the Danish mission was located here, and since the 1950s, the building has housed the Canadian embassy. In 1957, during a tour of the USSR, the embassy was visited by Canadian pianist Glenn Gould.