 Against Krupskaya's protestations, Lenin's body was embalmed to preserve it for long-term public display in the Red Square mausoleum.During this process, Lenin's brain was removed; in 1925 an institute was established to dissect it, revealing that Lenin had suffered from severe sclerosis.In July 1929, the Politburo agreed to replace the temporary mausoleum with a permanent granite alternative, which was finished in 1933.