Maria Mikhailovna was buried with her husband in the Trinity Monastery, but during the Soviet era, their grave was desecrated, and the chapel was destroyed.

Kiseleva's spiritual will is striking in its generosity. In brief, she transferred ownership and common possession of 6,000 desyatins of land to former peasants from various villages and left them a capital of 39,837 rubles, the interest from which they could use in hard times, such as crop failures, fires, or livestock deaths. She allocated an endowment of 565,000 rubles for the almshouses. Gifts were also given to: the Spaso-Transfiguration Monastery, an estate in Penza, 5,000 rubles, and valuable icons; the Arzamas Alexeyevskaya Women's Community, 50 desyatins of land; the Palestinian Orthodox Society, the Main Russian Red Cross Society, the institution for the mentally ill 'Joy of All Who Sorrow' in St. Petersburg, and the Nikolaev Military Chesme Almshouse, each receiving 50,000 rubles. Additionally, significant amounts were designated for the Moscow Missionary Society, wounded soldiers who did not receive pensions, the education of children from noble families in Russia, and 100,000 rubles were donated to help the poor in Palestine, Candia, Bulgaria, and Mesopotamia. All these socially beneficial and outstanding deeds were known, but many of her good acts remained a secret and were known only to those who received help. Living modestly and in seclusion, Maria Mikhailovna always cared for widows and orphans, helping all in need without refusing anyone. Her life was a vivid testimony of great love for God and people.