The thesis is an investigation of Rumanian syllabo-tonic versification of XIX century focused on metrics and rhythm in comparison with the specific development of Ukrainian syllabo-tonic in 1800-1899. For the first time in diachrony based on periods and the poetic analysis of a great number of poetic works, the Romanian syllabo-tonic poetics of XIX century is statistically researched to define the trends in Romanian authors’ tendencies in national metric repertoire, typological features of the main rhythm system are revealed, common and different features are determined in Romanian and Ukrainian syllabo-tonics of XIX century. The results of the study specify Romanian and Ukrainian national versifications markers and make our knowledge of certain regularities of European versifications developing in XIX century deeper.