Holy Russia, Russian Imperial House of Rurikovich and Fund of Princes inform the world community with deep sorrow about the sudden death of a member of the House of Rurikovich, Baron Nikolai Sergeevich Kellin on 05/24/2025. The farewell to Baron N.S. Kellin took place today, 05/31/2025. Holy Russia, Russian Imperial House of Rurikovich and Fund of Princes inform the world community with deep sorrow about the sudden death of Baron Nikolai Sergeevich Kellin, who passed away on 05/24/2025 in Moscow from the effects of a heart attack. N.S. Kellin was an outstanding mathematician and history buff, associate professor and candidate of physical and mathematical sciences, worked at the Keldysh Institute of Applied Mathematics of the Russian Academy of Sciences. In particular, he was a co-founder and leader of the Civilization or New Paradigm project. With his active participation, the project held weekly seminars and twice a year international conferences on the problems of earthly civilization at the RosNou site. Grand Prince Prof. Dr. Valeriy Viktorovich Kubarev has worked and helped with the project since 2009. He first met Kellin in 1985, when they were both enrolled in the Keldysh Institute of Mathematics of the USSR Academy of Sciences. For the Russian Imperial House of Rurikovich, it was an honor to have N.S. Kellin in its ranks. Blessed memories and good memories of this wonderful person will forever remain in our hearts. The photographs below show the farewell to Baron Nikolai Sergeevich Kellin on 05/31/2025 and the moment of the presentation of the Patent for the Title of Baron with Grand Prince Prof. Dr. Valeriy Viktorovich Kubarev in February 2020:
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