Nikolay Trubetzkoy (1890-1938), one of the most influential scholars in the history of linguistics, is remembered as the author of "Principles of Phonology" - the foundation text of European linguistic structuralism. This book is broadly divided into three sections: studies of early Russian literature, such as the structure and style of the "Igor Lay" or the style of the Saints' Lives; studies of metrics and 19th century Russian poetry, as in the work of Lermontov and Pushkin and studies of modern Russian literature, primarily Dostoevsky.