The article is devoted to the literary and theatre critic and poetry theorist Valerian A. Chudovsky (1882—1937). The biographical part describes his origins, places of work, and mentions key moments of his personal life. The author gathers and comments on his opinions about works by A. Akhmatova, V. Bryusov, Z. Gippius, D. Merezhkovsky, etc. Instigated by Vyacheslav Ivanov’s seminars and Andrey Bely’s rhythmological discoveries, Chudovsky’s studies of poetry are described in the light of theoretical research into rhythm, meter, the correlation between iamb and trochee, and oral narration. The author explains Chudovsky’s achievements in developing the concept of ‘phonophoria’. The article stresses the affiliation of Chudovsky’s poetry studies with the 1910s Russian Acmeist aesthetics and demonstrates that they correspond to O. Mandelstam’s ideas. The journal article is supplemented with a detailed bibliography (in accordance with the section hierarchy envisaged for encyclopaedic editions) and formatted according to the journal’s standards.