Rare photographs of Ulaanbaatar are to be exhibited on the 375th “birthday” of the capital city. One of numerous actions to be taken place for the 375th celebration is the photography exhibition, which will show photographs delivered from a house-museum of XX century's Russian scientist and Mongolist P.K.Kozlov.  The scholar, who lived and worked in Ulaanbaatar in the beginning of the 20th century, possessed rare and unique photographs of Ulaanbaatar.