I agree with Tobik that Lenin's body should be removed from the mausoleum and buried elsewhere, but that the mausoleum itself should be preserved, intact, as a historical monument. What would be most appropriate would be to turn it into a museum of the victims of Communism, or perhaps the October Revolution. But architecturally speaking, yes, it is valuable and I don't think it in any way detracts from the overall beauty of the other buildings in the Kremlin. IMHO it is useless to try to erase the physical vestiges of history entirely; one can hope to mitigate the worst outrages (Lenin's "mummy" is in the worst possible taste, and would have outraged Lenin himself!), but architectural monuments are another matter entirely. I think that, unless they celebrate mass murder, they should be allowed to stand as mute testimony to the past.