A study of temperature and humidity control in unheated museums of Moscow and Moscow districts: Ostankino, Arkhangelskoye, the State Museum of Pottery located in the 18th century country-estate museum Kuskovo, Tutchev's memorial museum Muranovo, the 16th-17th century museum Kolomenskoye. The most typical changes in microclimate have been identified. Consequently, regulations to protect museum collections in such buildings were developed. The relationship between the number of visitors and the microclimate is discussed; recommendations for its stabilization are given. -- AATA