Lenin’s mausoleum, on the Red Square in Moscow, Russia, is open to the public, and has been ever since its construction after his death in 1924.
The father of the revolution himself. When on public display, he has a thin layer of rubber, under which are embalming fluids.
To preserve the body, they initially wanted to pump embalming fluids through his veins, but his arteries and blood vessels had already been cut by his physician (after his death of course).
Traditional methods of conservation are good, but are not used for Lenin. On the long term, these methods tend to make the body stiff and fragile, and they discolor the skin. They last (only) a couple of decades.
Another method would be plastination, which is basically when the the liquids in a body are turned into polymers. This, however, makes the body very (unnaturally) rigid.
Instead, he takes a bath. Shown here is the bi-yearly process of embalming the body in a bath of chemicals, which is a process that takes about 6 weeks.
The team of six employees in charge of the task of preserving the body must see to it that the body’s shape, weight, color, limb flexibility and suppleness is kept, and that any signs of decay such as dark spots are taken care of.
There have also been damages and impurities on his body over time and with the different preservation processes he has already undergone. His eyelashes have been replaced when they were damaged. A piece of skin came off his foot in 1945, so they had to replace that. His nose and face have been partially resculpted.
Here he is on public display.