I know somebody who worked on project (it was actually her work for graduating bechelor or master (not sure)), for redesigning of the Buzludzha building into a museum. After graduating she went to Bulgaria and wanted to find supporters to fulfill this idea. Her first adress was Volen Siderov from the ATAKA (Nationalist) - party but unfortunately the jounalists wrote something bad about her and the project died.
However, this will happen to every building of a collapsing regime.