Full Video of State Funeral of Mikhail Kalinin (1875-1946), longest serving Head of State of the USSR from 1919-1946, former Chairman of the Central Executive Committee of the Congress of Soviets (former Head of State title) from 1922-1938, former Chairman of the Central Executive Committee of the All-Russian Congress of Soviets (former Head of State title) from 1919-1922 and Chairman of the Presidium of the Supreme Soviet from 1938-1946
He retired in 1946 and died of cancer in Moscow at the age of 70 years old, according to Wikipedia