In 1935 I was appointed leading artist of the All-Soviet Agricultural Exhibition. I opposed the errors of the first leader, and resigned. Afterwards, while I was still in the sanatorium, I took over the design of the main building. The design of the main hall has been done according to my idea until now. From 1931 on, I was leading artist-architect of the 'Permanent Building Exhibition'. But as the years went by, my health deteriorating, I had less and less energy left for this type of commission, such as the realization of large-scale exhibitions. I still succeeded in designing the project for the museum-exhibition of the Ministry of 'Social Security'.