Margarita Kirillovna Morozova, born Mamontova, came into the world in 1873. Her mother, Margarita Ottovna Levenstein (1852-1929), was a hereditary honorary citizen and owner of a women's clothing atelier. Her father, Kirill Nikolaevich Mamontov (1848-1879), a second-guild merchant, traded tableware on Basmannaya Street in Moscow.

Margarita Kirillovna always strived for education. She spoke French fluently and attended lectures on history and Russian literature. Her husband was Mikhail Abramovich Morozov, a wealthy industrialist, collector, and patron, the son of Varvara Alexeyevna Morozova (née Khlyudova) and textile manufacturer Abram Abramovich Morozov. Varvara Alexeyevna, having lost her husband early, successfully managed the inherited factory.

During Mikhail Abramovich's lifetime, their home hosted gatherings with artists, where lively discussions took place. Among the guests were artists V. Serov, K. Korovin, A. Vasnetsov, V. Surikov, sculptor Paolo Trubetskoy, performers M. Sadovsky, N. Efros, theater critics, and representatives of the high nobility, such as Count L. N. Ignatiev, Prince V. M. Urusov, and Prince P. M. Volkonsky. These individuals became the foundation for the salons that Margarita Kirillovna later held. In her drawing room, writers, poets, artists, historians, and philosophers gathered.

After her husband's death, Margarita Kirillovna, along with her children, sons Yuri and Mikhail and daughters Maria and Elena, went to Switzerland for a year. Upon returning to Moscow, she actively engaged in social and political activities, which were discussed among the progressive Russian intelligentsia in her salons.

Her social activities were not limited to salons. She financed the magazine "Questions of Philosophy and Psychology," edited by the idealist philosopher L. Lopatin, and the newspaper "Moscow Weekly." These publications and gatherings in her home influenced the philosophical and religious life of Moscow at the beginning of the century.

Margarita Kirillovna continued to maintain ties with the musical world, studying under composers N. Medtner and A. Scriabin, whom she considered her teacher. During her time abroad, she paid Scriabin an annual pension of two thousand rubles and financed the publication of his works and the organization of concerts, allowing him to focus on his creativity.

Charity held an important place in Margarita Kirillovna's life. After her husband's death, she donated 60 thousand rubles for the purchase of a building for charitable institutions, where a shelter with a craft school for 100 children was opened. This establishment received food and clothing from her annually.

In 1910, she transferred 60 paintings from her husband's collection to the Tretyakov Gallery. At her estate "Mikhaylovskoye" in the Kaluga province, she organized a school and club for peasants, providing them with material support. In her Moscow home on Novinsky Boulevard, she set up a hospital for the wounded in World War I.

After 1917, her Moscow mansion was nationalized, and the paintings were confiscated. Margarita Kirillovna did not leave Russia and lived with her sister Elena (married name Vostryakova) in a semi-basement of her house, where the kitchen and servants' rooms used to be.

Despite the hardships, she endured them with Christian humility. In a worn dress, yet still remarkably beautiful, she sat in the front rows at concerts in the conservatory. In her last years, she lived in two rooms of a new neighborhood behind Lenin's Hills on Borovskoye Highway, near Moscow State University. Here she wrote her memoirs about her youth and meetings with Andrei Bely, Alexander Scriabin, the Metner brothers, and other notable figures. Margarita Kirillovna passed away on October 3, 1958, at the age of 85.