Vladimir was born on April 22, 1870 in Simbirsk, Russia as the third child in a well educated family. Since, education was such an important value within his family he continued on that path and enrolled at Kazan University to study law, which didn't last long due to Vladimir being expelled for taking part in a student demonstration. He then soon after went back to school to get his law degree and then took a particular interest in politics. During the revolution of 1905 Vladimir was called to war to fight against the Japanese, though during WW1 we went into to exile and did not return until 1917, when he returned to Russia and denounced the country's newly formed provisional government and decided something needed to be changed so he masterminded the Bolshevik take-over of power, that would have a government ruled directly by the soldiers, peasants, and workers. This lead to a three year civil war, that ended with Vladimir succeeding and being able to form the USSR and become its first official leader. This gave him the title of the "the greatest revolutionary leader and thinker since Marx".
The events that lead up to his death started with an attempted assassination against him in 1918 that affected his health for the worst in the long-term. Soon after Vladimir had a stroke in May, 1922 that he never fully recovered from and resulted in a second stroke that happened in December of the same year, causing the right side of his body to be partly paralyzed and made him withdraw from active politics. Finally, Vladimir had a third stroke that occurred int March of 1923 left him unable to function and bedridden until he passed away on the 21st of January, 1924 at the age of 53.
Vladimir Lenin's body was mummified by using the embalmment process, which is the preserving of human remains by treating them to forestall decomposition, this is normally done to bodies to keep them preserved for viewing at funerals and such. The three goals of embalming is sanitation, presentation, and preservation/restoration.
The Center for Scientific Research and Teaching Methods in Biochemical Technologies is focused on the physical form, not the original biological matter. This method is called "quasibiological". They substitute parts of skin and flesh with plastic and other materials, so the original biological matter is less of what it previously was.
Vladimir's Death was due to natural causes.